[media] gspca - stv06xx: Set a lower default value of gain for hdcs sensors

Many users said that the default gain value (128) was giving white images.
The value which was in the original qc-usb driver (50) is better.
Signed-off-by: NJean-François Moine <moinejf@free.fr>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/gspca/stv06xx/stv06xx_hdcs.h

@@ -125,7 +125,7 @@
 #define HDCS_SLEEP_MODE		(1 << 1)
 
 #define HDCS_DEFAULT_EXPOSURE	48
-#define HDCS_DEFAULT_GAIN	128
+#define HDCS_DEFAULT_GAIN	50
 
 static int hdcs_probe_1x00(struct sd *sd);
 static int hdcs_probe_1020(struct sd *sd);