[media] tw9903: add new tw9903 video decoder

This based on the wis-tw9903.c driver that's part of the go7007 driver.
It has been converted to a v4l subdev driver by Pete Eberlein, and I made
additional cleanups.
Based on work by: Pete Eberlein <pete@sensoray.com>

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 5df353f..eb1831c 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -301,6 +301,16 @@
 	  To compile this driver as a module, choose M here: the
 	  module will be called tvp7002.
 
+config VIDEO_TW9903
+	tristate "Techwell TW9903 video decoder"
+	depends on VIDEO_V4L2 && I2C
+	---help---
+	  Support for the Techwell 9903 multi-standard video decoder
+	  with high quality down scaler.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called tw9903.
+
 config VIDEO_VPX3220
 	tristate "vpx3220a, vpx3216b & vpx3214c video decoders"
 	depends on VIDEO_V4L2 && I2C