Fixes the following warnings:

../drivers/video/fbdev/hitfb.c:186:5: warning: no previous prototype for 'hitfb_blank' [-Wmissing-prototypes]
  186 | int hitfb_blank(int blank_mode, struct fb_info *info)
      |     ^~~~~~~~~~~

../drivers/video/fbdev/hitfb.c:186:5: warning: symbol 'hitfb_blank' was not declared. Should it be static?

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/video/fbdev/hitfb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/hitfb.c b/drivers/video/fbdev/hitfb.c
index fb82869283db..551b00f761a7 100644
--- a/drivers/video/fbdev/hitfb.c
+++ b/drivers/video/fbdev/hitfb.c

@@ -183,7 +183,7 @@ static int hitfb_pan_display(struct fb_var_screeninfo *var,
 	return 0;
 }
 
-int hitfb_blank(int blank_mode, struct fb_info *info)
+static int hitfb_blank(int blank_mode, struct fb_info *info)
 {
 	unsigned short v;
 

-- 
2.40.1