The DSI to HDMI bridge supports hot-plut-detect, but the
driver didn't previously support a shared IRQ GPIO.  With
the driver updated, the interrupt can be added to the bridge.
Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>