misc: kconfig: Remove redundant 'default n' properties

Bool symbols implicitly default to 'n'.

A 'default n' can make sense e.g. in a Kconfig.defconfig file, if you
want to override a 'default y' on the base definition of the symbol. It
isn't used like that on any of these symbols though.

Piggyback removal of some 'default ""' properties on string symbols. The
empty string is the default.

Signed-off-by: Ulf Magnusson <[email protected]>

misc/Kconfig

@@ -64,7 +64,6 @@ config HAVE_CUSTOM_LINKER_SCRIPT
 
 config CUSTOM_LINKER_SCRIPT
 	string "Path to custom linker script"
-	default ""
 	depends on HAVE_CUSTOM_LINKER_SCRIPT
 	help
 	  Path to the linker script to be used instead of the one define by the
@@ -79,28 +78,24 @@ config CUSTOM_LINKER_SCRIPT
 
 config CUSTOM_RODATA_LD
 	bool "Include custom-rodata.ld"
-	default n
 	help
 	  Include a customized linker script fragment for inserting additional
 	  data and linker directives into the rodata section.
 
 config CUSTOM_RWDATA_LD
 	bool "Include custom-rwdata.ld"
-	default n
 	help
 	  Include a customized linker script fragment for inserting additional
 	  data and linker directives into the data section.
 
 config CUSTOM_SECTIONS_LD
 	bool "Include custom-sections.ld"
-	default n
 	help
 	  Include a customized linker script fragment for inserting additional
 	  arbitrary sections.
 
 config LINK_WHOLE_ARCHIVE
 	bool "Allow linking with --whole-archive"
-	default n
 	help
 	  This options allows linking external libraries with the
 	  --whole-archive option to keep all symbols.
@@ -131,7 +126,6 @@ config CROSS_COMPILE
 
 config NATIVE_APPLICATION
 	bool "Build as a native host application"
-	default n
 	help
 	  Build as a native application that can run on the host and using
 	  resources and libraries provided by the host.
@@ -175,7 +169,6 @@ endchoice
 config COMPILER_OPT
 	string
 	prompt "Custom compiler options"
-	default ""
 	help
 	  This option is a free-form string that is passed to the compiler
 	  when building all parts of a project (i.e. kernel).
@@ -186,7 +179,6 @@ config COMPILER_OPT
 
 config CPLUSPLUS
 	bool "Enable C++ support for the application"
-	default n
 	help
 	  This option enables the use of applications built with C++.
 
@@ -228,7 +220,6 @@ config OUTPUT_PRINT_MEMORY_USAGE
 
 config BUILD_OUTPUT_HEX
 	bool "Build a binary in HEX format"
-	default n
 	help
 	  Build a binary in HEX format. This will build a zephyr.hex file need
 	  by some platforms.
@@ -242,21 +233,18 @@ config BUILD_OUTPUT_BIN
 
 config BUILD_OUTPUT_EXE
 	bool "Build a binary in ELF format with .exe extension"
-	default n
 	help
 	  Build a binary in ELF format that can run in the host system. This
 	  will build a zephyr.exe file.
 
 config BUILD_OUTPUT_S19
 	bool "Build a binary in S19 format"
-	default n
 	help
 	  Build a binary in S19 format. This will build a zephyr.s19 file need
 	  by some platforms.
 
 config BUILD_OUTPUT_STRIPPED
 	bool "Build a stripped binary"
-	default n
 	help
 	  Build a stripped binary. This will build a zephyr.stripped file need
 	  by some platforms.
@@ -269,14 +257,12 @@ menu "System Monitoring Options"
 config PERFORMANCE_METRICS
 	bool
 	prompt "Enable performance metrics [EXPERIMENTAL]"
-	default n
 	help
 	  Enable Performance Metrics.
 
 config BOOT_TIME_MEASUREMENT
 	bool
 	prompt "Boot time measurements [EXPERIMENTAL]"
-	default n
 	depends on PERFORMANCE_METRICS
 	help
 	  This option enables the recording of timestamps during system start
@@ -297,7 +283,6 @@ config CPU_CLOCK_FREQ_MHZ
 config STATS
 	bool
 	prompt "Statistics support"
-	default n
 	help
 	  Enable per-module event counters for troubleshooting, maintenance,
 	  and usage monitoring.  Statistics can be retrieved with the mcumgr
@@ -307,7 +292,6 @@ config STATS_NAMES
 	bool
 	prompt "Statistic names"
 	depends on STATS
-	default n
 	help
 	  Include a full name string for each statistic in the build.  If this
 	  setting is disabled, statistics are assigned generic names of the
@@ -319,7 +303,6 @@ menu "Boot Options"
 
 config IS_BOOTLOADER
 	bool "Act as a bootloader"
-	default n
 	depends on XIP
 	depends on ARM
 	help
@@ -341,7 +324,6 @@ config BOOTLOADER_SRAM_SIZE
 config BOOTLOADER_MCUBOOT
 	bool
 	prompt "MCUboot bootloader support"
-	default n
 	help
 	  This option signifies that the target uses MCUboot as a bootloader,
 	  or in other words that the image is to be chain-loaded by MCUboot.
@@ -360,15 +342,13 @@ config BOOTLOADER_KEXEC
 	bool
 	prompt "Boot using Linux kexec() system call"
 	depends on X86
-	default n
 	help
 	  This option signifies that Linux boots the kernel using kexec system call
 	  and utility. This method is used to boot the kernel over the network.
 
 config BOOTLOADER_UNKNOWN
 	bool
 	prompt "Generic boot loader support"
-	default n
 	depends on X86
 	help
 	  This option signifies that the target has a generic bootloader
@@ -388,7 +368,6 @@ config BOOTLOADER_CONTEXT_RESTORE
 
 config REBOOT
 	bool "Reboot functionality"
-	default n
 	select SYSTEM_CLOCK_DISABLE
 	help
 	  Enable the sys_reboot() API. Enabling this can drag in other subsystems