rtl8730e: Define mount point for userfs according to internal/externa…

…l flash

In case of board with second(external) flash, userfs is located in second flash.
Most of codes using userfs are implemented with mount point, "/mnt".
So we need to set mount point as "/mnt" for userfs in second flash for compatibility.

build/configs/rtl8730e/loadable_ext/defconfig

@@ -322,6 +322,8 @@ CONFIG_FLASH_VSTART_LOADABLE=0xe000000
 CONFIG_BOARD_FLASH_32M=y
 CONFIG_SECOND_FLASH_START_ADDR=0x0A000000
 CONFIG_RTL8730E_BOARD_REVISION=7
+CONFIG_USERFS_MNTPT="/mnt0"
+CONFIG_USERFS_EXT_MNTPT="/mnt"
 
 #
 # SPI Flash driver

os/board/rtl8730e/Kconfig

@@ -90,6 +90,19 @@ config FLASH_SIZE
         A size of flash (in bytes).
         This is fixed value, so user doesn't need to change it.
 
+config USERFS_MNTPT
+    string
+    default "/mnt" if AUTOMOUNT_USERFS && !SECOND_FLASH_PARTITION
+    default "/mnt0" if AUTOMOUNT_USERFS && SECOND_FLASH_PARTITION
+    help
+        A mount point name of first flash partition.
+
+config USERFS_EXT_MNTPT
+    string
+    default "/mnt" if AUTOMOUNT_USERFS && SECOND_FLASH_PARTITION
+    help
+        A mount point name of second flash partition.
+
 config FLASH_STATUS_BITS
 	hex
 	default 0x28