ARM: at91: at91_dt_defconfig: enable INPUT_POLLDEV

Enable INPUT_POLLDEV as it is still available in usptream kernel.

Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>

Author: cristibirsan

arch/arm/configs/at91_dt_defconfig

@@ -110,6 +110,7 @@ CONFIG_RT2800USB_RT53XX=y
 CONFIG_RT2800USB_RT55XX=y
 CONFIG_RT2800USB_UNKNOWN=y
 CONFIG_RTL8187=m
+CONFIG_INPUT_POLLDEV=y
 CONFIG_INPUT_JOYDEV=y
 CONFIG_INPUT_EVDEV=y
 # CONFIG_KEYBOARD_ATKBD is not set