ARM: shmobile: Remove the ARCH_SHMOBILE Kconfig symbol

All drivers for Renesas ARM SoCs have gained proper ARCH_RENESAS
platform dependencies.  Hence finish the conversion from ARCH_SHMOBILE
to ARCH_RENESAS for Renesas 32-bit ARM SoCs, as started by commit
9b5ba0df ("ARM: shmobile: Introduce ARCH_RENESAS").
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/Kconfig

-config ARCH_SHMOBILE
-	bool
-
 config PM_RMOBILE
 	bool
 	select PM
@@ -30,7 +27,6 @@ config ARCH_RMOBILE
 menuconfig ARCH_RENESAS
 	bool "Renesas ARM SoCs"
 	depends on ARCH_MULTI_V7 && MMU
-	select ARCH_SHMOBILE
 	select ARM_GIC
 	select GPIOLIB
 	select HAVE_ARM_SCU if SMP