libcamera: camera_sensor: Verify flips support

During the camera sensor driver validation, verify if the sensor
supports horizontal and vertical flips and store a flag as
CameraSensor::supportFlips_ class member.

The flag will be later inspected when applying flips.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>

include/libcamera/internal/camera_sensor.h

@@ -101,6 +101,7 @@ private:
 	Size pixelArraySize_;
 	Rectangle activeArea_;
 	const BayerFormat *bayerFormat_;
+	bool supportFlips_;
 
 	ControlList properties_;