Enable RTC driver.

The MC13783 MFD also contains an RTC. Enable it.
To avoid "No RTC device found, ALARM timers will not wake from suspend",
this patch is needed:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=c008ba58af24dc5d0d8e9fe6e59d876910254761Signed-off-by: Jürgen Lambrecht <J.Lambrecht@televic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-imx/mach-mx27_3ds.c

@@ -293,7 +293,8 @@ static struct mc13xxx_platform_data mc13783_pdata = {
 		.num_regulators = ARRAY_SIZE(mx27_3ds_regulators),
 
 	},
-	.flags  = MC13783_USE_REGULATOR | MC13783_USE_TOUCHSCREEN,
+	.flags  = MC13783_USE_REGULATOR | MC13783_USE_TOUCHSCREEN |
+	MC13783_USE_RTC,
 };
 
 /* SPI */