fbdev: efifb: Change the return value type to void

efifb_setup() doesn't need to return a value.

Signed-off-by: Shixiong Ou <[e-mail]>
Signed-off-by: Helge Deller <[e-mail]>

drivers/video/fbdev/efifb.c

···
 	.fb_setcolreg	= efifb_setcolreg,
 };
 
-static int efifb_setup(struct screen_info *si, char *options)
+static void efifb_setup(struct screen_info *si, char *options)
 {
 	char *this_opt;
 
···
 				use_bgrt = false;
 		}
 	}
-
-	return 0;
 }
 
 static inline bool fb_base_is_valid(struct screen_info *si)