[media] video: sn9c102: world-wirtable sysfs files

Don't allow everybody to change video settings.

Signed-off-by: Vasiliy Kulikov <[e-mail]>
Acked-by: Mauro Carvalho Chehab <[e-mail]>
Acked-by: Luca Risolia <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/video/sn9c102/sn9c102_core.c

···
 		   sn9c102_show_i2c_reg, sn9c102_store_i2c_reg);
 static DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
 		   sn9c102_show_i2c_val, sn9c102_store_i2c_val);
-static DEVICE_ATTR(green, S_IWUGO, NULL, sn9c102_store_green);
-static DEVICE_ATTR(blue, S_IWUGO, NULL, sn9c102_store_blue);
-static DEVICE_ATTR(red, S_IWUGO, NULL, sn9c102_store_red);
+static DEVICE_ATTR(green, S_IWUSR, NULL, sn9c102_store_green);
+static DEVICE_ATTR(blue, S_IWUSR, NULL, sn9c102_store_blue);
+static DEVICE_ATTR(red, S_IWUSR, NULL, sn9c102_store_red);
 static DEVICE_ATTR(frame_header, S_IRUGO, sn9c102_show_frame_header, NULL);