V4L/DVB (11742): TI THS7303 video amplifier driver code

This patch adds driver for TI THS7303 video amplifier. This driver is
implemented as a v4l2 sub device. Tested on TI DM646x EVM.

This version has updates based on review comments by Mauro Chehab.

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/media/v4l2-chip-ident.h b/include/media/v4l2-chip-ident.h
index 1be461a..fbeb98f 100644
--- a/include/media/v4l2-chip-ident.h
+++ b/include/media/v4l2-chip-ident.h
@@ -137,6 +137,9 @@
 	/* module saa7191: just ident 7191 */
 	V4L2_IDENT_SAA7191 = 7191,
 
+	/* module ths7303: just ident 7303 */
+	V4L2_IDENT_THS7303 = 7303,
+
 	/* module wm8739: just ident 8739 */
 	V4L2_IDENT_WM8739 = 8739,