[media] V4L2: Add seek spacing and RDS CAP bits

Add spacing field to v4l2_hw_freq_seek.

Add V4L2_TUNER_CAP_RDS_BLOCK_IO, which indicates that the tuner/
transmitter if capable of transmitting/receiving RDS blocks.

Add V4L2_TUNER_CAP_RDS_CONTROLS capability, which indicates that the
RDS data is handled as values of predefined controls like radio text,
program ID and so on.

Signed-off-by: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

include/linux/videodev2.h

@@ -1368,6 +1368,8 @@ struct v4l2_modulator {
 #define V4L2_TUNER_CAP_SAP		0x0020
 #define V4L2_TUNER_CAP_LANG1		0x0040
 #define V4L2_TUNER_CAP_RDS		0x0080
+#define V4L2_TUNER_CAP_RDS_BLOCK_IO	0x0100
+#define V4L2_TUNER_CAP_RDS_CONTROLS	0x0200
 
 /*  Flags for the 'rxsubchans' field */
 #define V4L2_TUNER_SUB_MONO		0x0001
@@ -1397,7 +1399,8 @@ struct v4l2_hw_freq_seek {
 	enum v4l2_tuner_type  type;
 	__u32		      seek_upward;
 	__u32		      wrap_around;
-	__u32		      reserved[8];
+	__u32		      spacing;
+	__u32		      reserved[7];
 };
 
 /*