Input: make needlessly global code static

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/touchscreen/mk712.c b/drivers/input/touchscreen/mk712.c
index 4844d25..3226830 100644
--- a/drivers/input/touchscreen/mk712.c
+++ b/drivers/input/touchscreen/mk712.c
@@ -154,7 +154,7 @@
 	spin_unlock_irqrestore(&mk712_lock, flags);
 }
 
-int __init mk712_init(void)
+static int __init mk712_init(void)
 {
 	int err;