V4L/DVB (8900): pvrusb2: Implement cropping pass through

This builds upon the previous pvrusb2 change to more formally
implement full cropping support.  This enables access from the
driver's V4L interface, and enables access to full capabilities from
sysfs as well.  Note that this is only effective when in analog mode.
It also will only work when the underlying digitizer's driver (saa7115
or cx25840 depending on the hardware) also implements the appropriate
functions.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h

@@ -308,6 +308,10 @@ struct pvr2_hdw {
 	struct v4l2_tuner tuner_signal_info;
 	int tuner_signal_stale;
 
+	/* Cropping capability info */
+	struct v4l2_cropcap cropcap_info;
+	int cropcap_stale;
+
 	/* Video standard handling */
 	v4l2_std_id std_mask_eeprom; // Hardware supported selections
 	v4l2_std_id std_mask_avail;  // Which standards we may select from
@@ -320,7 +324,6 @@ struct pvr2_hdw {
 	struct pvr2_ctl_info std_info_cur;
 	struct v4l2_standard *std_defs;
 	const char **std_enum_names;
-	struct v4l2_cropcap cropcap;
 
 	// Generated string names, one per actual V4L2 standard
 	const char *std_mask_ptrs[32];