[media] pwc: Use v4l2-device and v4l2-fh

This is a preperation patch for adding support for control events. Actually
enabling support for control events will be done in a separate patch, as that
depends on the necessary poll changes going upstream

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/pwc/pwc.h b/drivers/media/video/pwc/pwc.h
index 0e4e2d7..dd75b9d 100644
--- a/drivers/media/video/pwc/pwc.h
+++ b/drivers/media/video/pwc/pwc.h
@@ -35,8 +35,11 @@
 #include <asm/errno.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
 #include <media/v4l2-ioctl.h>
 #include <media/v4l2-ctrls.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
 #include <media/videobuf2-vmalloc.h>
 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
 #include <linux/input.h>
@@ -198,6 +201,7 @@
 struct pwc_device
 {
 	struct video_device vdev;
+	struct v4l2_device v4l2_dev;
 	struct mutex modlock;
 
 	/* Pointer to our usb_device, may be NULL after unplug */