video: fbdev: au1200fb: Propagate an error code

We should propagate the error code returned by 'fb_alloc_cmap()' instead
of returning -EFAULT.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/au1200fb.c

@@ -1518,7 +1518,7 @@ static irqreturn_t au1200fb_handle_irq(int irq, void* dev_id)
 static int au1200fb_init_fbinfo(struct au1200fb_device *fbdev)
 {
 	struct fb_info *fbi = fbdev->fb_info;
-	int bpp;
+	int bpp, ret;
 
 	fbi->fbops = &au1200fb_fb_ops;
 
@@ -1550,10 +1550,11 @@ static int au1200fb_init_fbinfo(struct au1200fb_device *fbdev)
 		return -ENOMEM;
 	}
 
-	if (fb_alloc_cmap(&fbi->cmap, AU1200_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
+	ret = fb_alloc_cmap(&fbi->cmap, AU1200_LCD_NBR_PALETTE_ENTRIES, 0);
+	if (ret < 0) {
 		print_err("Fail to allocate colormap (%d entries)",
 			   AU1200_LCD_NBR_PALETTE_ENTRIES);
-		return -EFAULT;
+		return ret;
 	}
 
 	strncpy(fbi->fix.id, "AU1200", sizeof(fbi->fix.id));