intelfb: fix sparse warnings

Fix this sparse warnings:

drivers/video/intelfb/intelfbdrv.c:1497:3: warning: returning void-valued expression
drivers/video/intelfb/intelfbdrv.c:1525:3: warning: returning void-valued expression
drivers/video/intelfb/intelfbdrv.c:1544:3: warning: returning void-valued expression
drivers/video/intelfb/intelfbdrv.c:1558:3: warning: returning void-valued expression

Signed-off-by: Hannes Eder <[e-mail]>
Cc: Krzysztof Helt <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/intelfb/intelfbdrv.c

···
 	DBG_MSG("intelfb_fillrect\n");
 #endif
 
-	if (!ACCEL(dinfo, info) || dinfo->depth == 4)
-		return cfb_fillrect(info, rect);
+	if (!ACCEL(dinfo, info) || dinfo->depth == 4) {
+		cfb_fillrect(info, rect);
+		return;
+	}
 
 	if (rect->rop == ROP_COPY)
 		rop = PAT_ROP_GXCOPY;
···
 	DBG_MSG("intelfb_copyarea\n");
 #endif
 
-	if (!ACCEL(dinfo, info) || dinfo->depth == 4)
-		return cfb_copyarea(info, region);
+	if (!ACCEL(dinfo, info) || dinfo->depth == 4) {
+		cfb_copyarea(info, region);
+		return;
+	}
 
 	intelfbhw_do_bitblt(dinfo, region->sx, region->sy, region->dx,
 			    region->dy, region->width, region->height,
···
 #endif
 
 	if (!ACCEL(dinfo, info) || dinfo->depth == 4
-	    || image->depth != 1)
-		return cfb_imageblit(info, image);
+	    || image->depth != 1) {
+		cfb_imageblit(info, image);
+		return;
+	}
 
 	if (dinfo->depth != 8) {
 		fgcolor = dinfo->pseudo_palette[image->fg_color];
···
 	if (!intelfbhw_do_drawglyph(dinfo, fgcolor, bgcolor, image->width,
 				    image->height, image->data,
 				    image->dx, image->dy,
-				    dinfo->pitch, info->var.bits_per_pixel))
-		return cfb_imageblit(info, image);
+				    dinfo->pitch, info->var.bits_per_pixel)) {
+		cfb_imageblit(info, image);
+		return;
+	}
 }
 
 static int intelfb_cursor(struct fb_info *info, struct fb_cursor *cursor)