V4L/DVB (10177): Fix sparse warnings on em28xx

/home/v4l/master/v4l/em28xx-core.c:396:25: warning: symbol 'outputs' was not declared. Should it be static?
/home/v4l/master/v4l/em28xx-input.c:324:6: warning: symbol 'em28xx_ir_start' was not declared. Should it be static?
/home/v4l/master/v4l/em28xx-cards.c:1925:5: warning: symbol 'em28xx_init_dev' was not declared. Should it be static?

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/em28xx/em28xx-input.c b/drivers/media/video/em28xx/em28xx-input.c
index 42bbaf6..0443afe 100644
--- a/drivers/media/video/em28xx/em28xx-input.c
+++ b/drivers/media/video/em28xx/em28xx-input.c
@@ -307,7 +307,7 @@
 	mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
 }
 
-void em28xx_ir_start(struct em28xx_IR *ir)
+static void em28xx_ir_start(struct em28xx_IR *ir)
 {
 	setup_timer(&ir->timer, ir_timer, (unsigned long)ir);
 	INIT_WORK(&ir->work, em28xx_ir_work);