mailbox/omap: consolidate OMAP mailbox driver

There is no need for a separate common OMAP mailbox module
now that the OMAP1 mailbox driver has been removed. So,
consolidate the two individual OMAP mailbox modules into a
single driver. This streamlines the driver for converting
to mailbox framework.

The following are the main changes:
- collapse mailbox-omap2.c into omap-mailbox.c
- remove omap_mbox_ops and replace the ops calls with
  the equivalent functionality.
- simplify the sub-mailbox startup/shutdown functionality,
  the one-time operations are moved into probe, and the
  pm_runtime_get_sync and pm_runtime_put_sync can be invoked
  without using a configuration counter.
- move all definitions from private omap_mbox.h into the
  source code, and eliminate this internal header.
- rename some variables that used the omap2_mbox prefix with
  a generic omap_mbox prefix.

Signed-off-by: Suman Anna <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>

drivers/mailbox/Kconfig

@@ -16,17 +16,9 @@ config PL320_MBOX
 	  Management Engine, primarily for cpufreq. Say Y here if you want
 	  to use the PL320 IPCM support.
 
-config OMAP_MBOX
-	tristate
-	help
-	  This option is selected by any OMAP architecture specific mailbox
-	  driver such as CONFIG_OMAP2PLUS_MBOX. This enables the common OMAP
-	  mailbox framework code.
-
 config OMAP2PLUS_MBOX
 	tristate "OMAP2+ Mailbox framework support"
 	depends on ARCH_OMAP2PLUS
-	select OMAP_MBOX
 	help
 	  Mailbox implementation for OMAP family chips with hardware for
 	  interprocessor communication involving DSP, IVA1.0 and IVA2 in

drivers/mailbox/Makefile

@@ -1,5 +1,3 @@
 obj-$(CONFIG_PL320_MBOX)	+= pl320-ipc.o
 
-obj-$(CONFIG_OMAP_MBOX)		+= omap-mailbox.o
-obj-$(CONFIG_OMAP2PLUS_MBOX)	+= mailbox_omap2.o
-mailbox_omap2-objs		:= mailbox-omap2.o
+obj-$(CONFIG_OMAP2PLUS_MBOX)	+= omap-mailbox.o