neofb: fix sparse warnings

Fix this sparse warnings:

  drivers/video/neofb.c:1456:4: warning: returning void-valued expression
  drivers/video/neofb.c:1464:3: warning: returning void-valued expression

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/neofb.c

@@ -1453,7 +1453,8 @@ neo2200_imageblit(struct fb_info *info, const struct fb_image *image)
 			 * is less than 16 bits wide. This is due to insufficient
 			 * padding when writing the image. We need to adjust
 			 * struct fb_pixmap. Not yet done. */
-			return cfb_imageblit(info, image);
+			cfb_imageblit(info, image);
+			return;
 		}
 		bltCntl_flags = NEO_BC0_SRC_MONO;
 	} else if (image->depth == info->var.bits_per_pixel) {
@@ -1461,7 +1462,8 @@ neo2200_imageblit(struct fb_info *info, const struct fb_image *image)
 	} else {
 		/* We don't currently support hardware acceleration if image
 		 * depth is different from display */
-		return cfb_imageblit(info, image);
+		cfb_imageblit(info, image);
+		return;
 	}
 
 	switch (info->var.bits_per_pixel) {