ARM: davinci: fix build failure with allnoconfig

allnoconfig build with just ARCH_DAVINCI enabled
fails because drivers/clk/davinci/* depends on
REGMAP being enabled.

Fix it by selecting REGMAP_MMIO when building in
DaVinci support.

Signed-off-by: Sekhar Nori <[e-mail]>
Reviewed-by: David Lechner <[e-mail]>
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/arm/Kconfig

···
 	select HAVE_IDE
 	select PM_GENERIC_DOMAINS if PM
 	select PM_GENERIC_DOMAINS_OF if PM && OF
+	select REGMAP_MMIO
 	select RESET_CONTROLLER
 	select SPARSE_IRQ
 	select USE_OF