i810: fix sparse warnings

Fix this sparse warnings:

drivers/video/i810/i810_accel.c:305:3: warning: returning void-valued expression
drivers/video/i810/i810_accel.c:331:3: warning: returning void-valued expression
drivers/video/i810/i810_accel.c:370:3: 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/i810/i810_accel.c

···
 	u32 dx, dy, width, height, dest, rop = 0, color = 0;
 
 	if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
-	    par->depth == 4) 
-		return cfb_fillrect(info, rect);
+	    par->depth == 4) {
+		cfb_fillrect(info, rect);
+		return;
+	}
 
 	if (par->depth == 1) 
 		color = rect->color;
···
 	u32 sx, sy, dx, dy, pitch, width, height, src, dest, xdir;
 
 	if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
-	    par->depth == 4)
-		return cfb_copyarea(info, region);
+	    par->depth == 4) {
+		cfb_copyarea(info, region);
+		return;
+	}
 
 	dx = region->dx * par->depth;
 	sx = region->sx * par->depth;
···
 	u32 fg = 0, bg = 0, size, dst;
 	
 	if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
-	    par->depth == 4 || image->depth != 1) 
-		return cfb_imageblit(info, image);
+	    par->depth == 4 || image->depth != 1) {
+		cfb_imageblit(info, image);
+		return;
+	}
 
 	switch (info->var.bits_per_pixel) {
 	case 8: