mx31_3ds: Add touchscreen support

On the mx31_3ds board the touchscreen feature is provided by MC13783 PMIC.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-mx3/mach-mx31_3ds.c

@@ -127,7 +127,7 @@ static struct mc13783_regulator_init_data mx31_3ds_regulators[] = {
 static struct mc13783_platform_data mc13783_pdata __initdata = {
 	.regulators = mx31_3ds_regulators,
 	.num_regulators = ARRAY_SIZE(mx31_3ds_regulators),
-	.flags  = MC13783_USE_REGULATOR,
+	.flags  = MC13783_USE_REGULATOR | MC13783_USE_TOUCHSCREEN,
 };
 
 /* SPI */