HID: picolcd: make fb_pending_lock and picolcd_fb_cleanup static

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-picolcd.c

@@ -632,7 +632,7 @@ struct picolcd_fb_cleanup_item {
 	struct picolcd_fb_cleanup_item *next;
 };
 static struct picolcd_fb_cleanup_item *fb_pending;
-DEFINE_SPINLOCK(fb_pending_lock);
+static DEFINE_SPINLOCK(fb_pending_lock);
 
 static void picolcd_fb_do_cleanup(struct work_struct *data)
 {
@@ -657,7 +657,7 @@ static void picolcd_fb_do_cleanup(struct work_struct *data)
 	} while (item);
 }
 
-DECLARE_WORK(picolcd_fb_cleanup, picolcd_fb_do_cleanup);
+static DECLARE_WORK(picolcd_fb_cleanup, picolcd_fb_do_cleanup);
 
 static int picolcd_fb_open(struct fb_info *info, int u)
 {