ARM: omap2plus_defconfig: enable support for TI touchscreen

Enable support for on-chip resistive touchscreen m found on AM335x and
AM437x devices.
Signed-off-by: NSekhar Nori <nsekhar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -208,6 +208,7 @@ CONFIG_TOUCHSCREEN_EDT_FT5X06=m
 CONFIG_TOUCHSCREEN_PIXCIR=m
 CONFIG_TOUCHSCREEN_TSC2005=m
 CONFIG_TOUCHSCREEN_TSC2007=m
+CONFIG_TOUCHSCREEN_TI_AM335X_TSC=m
 CONFIG_INPUT_MISC=y
 CONFIG_INPUT_TPS65218_PWRBUTTON=m
 CONFIG_INPUT_TWL4030_PWRBUTTON=m