ARM: multi_v7_defconfig: add generic resistive touchscreen

Add generic resistive touchscreen CONFIG_TOUCHSCREEN_ADC
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

arch/arm/configs/multi_v7_defconfig

@@ -282,6 +282,7 @@ CONFIG_MOUSE_PS2_ELANTECH=y
 CONFIG_MOUSE_CYAPA=m
 CONFIG_MOUSE_ELAN_I2C=y
 CONFIG_INPUT_TOUCHSCREEN=y
+CONFIG_TOUCHSCREEN_ADC=m
 CONFIG_TOUCHSCREEN_ATMEL_MXT=m
 CONFIG_TOUCHSCREEN_MMS114=m
 CONFIG_TOUCHSCREEN_WM97XX=m