V4L/DVB (13899): gspca - all subdrivers: Make control descriptors constant.

The ctrls field of struct sd_desc is declared as const
in gspca.h. It is worth to initialize the content also with
constant values.

Signed-off-by: Marton Nemeth <nm127@freemail.hu>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/stv0680.c b/drivers/media/video/gspca/stv0680.c
index 2a69d7c..856675e 100644
--- a/drivers/media/video/gspca/stv0680.c
+++ b/drivers/media/video/gspca/stv0680.c
@@ -45,7 +45,7 @@
 };
 
 /* V4L2 controls supported by the driver */
-static struct ctrl sd_ctrls[] = {
+static const struct ctrl sd_ctrls[] = {
 };
 
 static int stv_sndctrl(struct gspca_dev *gspca_dev, int set, u8 req, u16 val,