ARM: mx31pdk: Add MC13783 RTC support

MX31PDK board has a MC13783 PMIC, which provides RTC functionality.

Add support for it.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-imx/mach-mx31_3ds.c

@@ -492,7 +492,7 @@ static struct mc13xxx_platform_data mc13783_pdata = {
 		.regulators = mx31_3ds_regulators,
 		.num_regulators = ARRAY_SIZE(mx31_3ds_regulators),
 	},
-	.flags  = MC13XXX_USE_TOUCHSCREEN,
+	.flags  = MC13XXX_USE_TOUCHSCREEN | MC13XXX_USE_RTC,
 };
 
 /* SPI */