V4L/DVB: core: add support for more color effects

Add support for more color effects (negative, sketch, emboss, etc) by
extending the  v4l2_colorfx enum items.

Signed-off-by: Xiaolin Zhang <xiaolin.zhang@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c
index 67944f5..035c414 100644
--- a/drivers/media/video/v4l2-common.c
+++ b/drivers/media/video/v4l2-common.c
@@ -343,6 +343,13 @@
 		"None",
 		"Black & White",
 		"Sepia",
+		"Negative",
+		"Emboss",
+		"Sketch",
+		"Sky blue",
+		"Grass green",
+		"Skin whiten",
+		"Vivid",
 		NULL
 	};
 	static const char *tune_preemphasis[] = {