V4L/DVB (4147): Drivers/media/video/pwc/: make code static

This patch makes the following needlessly global code static:
- pwc-ctrl.c: pwc_get_leds()
- pwc_preferred_compression

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/pwc/pwc-ctrl.c b/drivers/media/video/pwc/pwc-ctrl.c
index 62a5813..0bd1155 100644
--- a/drivers/media/video/pwc/pwc-ctrl.c
+++ b/drivers/media/video/pwc/pwc-ctrl.c
@@ -925,7 +925,7 @@
 	return SendControlMsg(SET_STATUS_CTL, LED_FORMATTER, 2);
 }
 
-int pwc_get_leds(struct pwc_device *pdev, int *on_value, int *off_value)
+static int pwc_get_leds(struct pwc_device *pdev, int *on_value, int *off_value)
 {
 	unsigned char buf[2];
 	int ret;