Initialize some of the RX-51 input GPIO lines as gpio keys. Enable gpio
keys as a module in rx51_defconfig.
Signed-off-by: NJani Nikula <ext-jani.1.nikula@nokia.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>