ARM: imx_v6_v7_defconfig: Select CONFIG_TOUCHSCREEN_EGALAX

egalax touchscren controller is present on mx6 sabresd/sabrelite, so let's
enable it by default.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/configs/imx_v6_v7_defconfig

@@ -127,6 +127,7 @@ CONFIG_KEYBOARD_IMX=y
 CONFIG_MOUSE_PS2=m
 CONFIG_MOUSE_PS2_ELANTECH=y
 CONFIG_INPUT_TOUCHSCREEN=y
+CONFIG_TOUCHSCREEN_EGALAX=y
 CONFIG_TOUCHSCREEN_MC13783=y
 CONFIG_INPUT_MISC=y
 CONFIG_INPUT_MMA8450=y