V4L/DVB (7106): em28xx/: make 2 functions static

This patch makes the following needlessly global functions static:
- em28xx-core.c:em28xx_write_reg_bits()
- em28xx-video.c:em28xx_vdev_init()
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/em28xx/em28xx-core.c

@@ -237,7 +237,7 @@ int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len)
  * sets only some bits (specified by bitmask) of a register, by first reading
  * the actual value
  */
-int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
+static int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
 				 u8 bitmask)
 {
 	int oldval;

drivers/media/video/em28xx/em28xx-video.c

@@ -1796,7 +1796,7 @@ void em28xx_unregister_extension(struct em28xx_ops *ops)
 }
 EXPORT_SYMBOL(em28xx_unregister_extension);
 
-struct video_device *em28xx_vdev_init(struct em28xx *dev,
+static struct video_device *em28xx_vdev_init(struct em28xx *dev,
 					     const struct video_device *template,
 					     const int type,
 					     const char *type_name)

drivers/media/video/em28xx/em28xx.h

@@ -345,8 +345,6 @@ int em28xx_read_reg(struct em28xx *dev, u16 reg);
 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
 			  int len);
 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len);
-int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
-			  u8 bitmask);
 int em28xx_set_audio_source(struct em28xx *dev);
 int em28xx_audio_analog_set(struct em28xx *dev);