ARM: OMAP2+: omap2plus_defconfig: enable omap1 rtc

The BeagleBone dev kit uses the built-in RTC module, so
it would be nice to have this built by default in the
omap2plus defconfig.
Signed-off-by: NMark Jackson <mpfj@newflow.co.uk>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -223,6 +223,7 @@ CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_TWL92330=y
 CONFIG_RTC_DRV_TWL4030=y
+CONFIG_RTC_DRV_OMAP=y
 CONFIG_DMADEVICES=y
 CONFIG_DMA_OMAP=y
 CONFIG_EXT2_FS=y