greybus: camera: Clean up when AP link power mode configuration failed

Restore the module link power mode to the previous state in that case.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Gjorgji Rosikopulos <grosikopulos@mm-sol.com>
Tested-by: Jacopo Mondi <jacopo.mondi@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/camera.c

@@ -147,6 +147,7 @@ static int gb_camera_set_power_mode(struct gb_camera *gcam, bool hs)
 
 	ret = gb_camera_set_intf_power_mode(gcam, svc->ap_intf_id, hs);
 	if (ret < 0) {
+		gb_camera_set_intf_power_mode(gcam, intf->interface_id, !hs);
 		gcam_err(gcam, "failed to set AP interface to %s (%d)\n",
 			 hs ? "HS" : "PWM", ret);
 		return ret;