This enables the GPIO interrupt controller for the Meson8 SoCs.
Interrupt support on the GPIOs can be used by the MMC framework to
detect when an SD card is inserted/removed or by the input framework to
detect button presses.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>