ARM: davinci_all_defconfig: enable RTC driver as module

This driver handles the RTC of most davinci SoCs.

Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/configs/davinci_all_defconfig

@@ -174,6 +174,7 @@ CONFIG_LEDS_TRIGGERS=y
 CONFIG_LEDS_TRIGGER_TIMER=m
 CONFIG_LEDS_TRIGGER_HEARTBEAT=m
 CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_OMAP=m
 CONFIG_DMADEVICES=y
 CONFIG_TI_EDMA=y
 CONFIG_EXT2_FS=y