ARM: centralize common multi-platform kconfig options

Multi-platform requires various kconfig options to be selected, so
platforms don't need to select them individually.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-nspire/Kconfig

@@ -3,14 +3,9 @@ config ARCH_NSPIRE
 	depends on ARCH_MULTI_V4_V5
 	depends on MMU
 	select CPU_ARM926T
-	select COMMON_CLK
-	select GENERIC_CLOCKEVENTS
 	select GENERIC_IRQ_CHIP
-	select SPARSE_IRQ
 	select ARM_AMBA
 	select ARM_VIC
 	select ARM_TIMER_SP804
-	select USE_OF
-	select CLKSRC_OF
 	help
 	  This enables support for systems using the TI-NSPIRE CPU