pxa168fb: fix release function mismatch in probe failure

The driver uses kfree() to release the resource allocated by
framebuffer_alloc(), which does not match.
Use framebuffer_release() instead to fix it.

Fixes: 638772c7 ("fb: add support of LCD display controller on pxa168/910 (base layer)")
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191205160613.32075-1-hslester96@gmail.com

drivers/video/fbdev/pxa168fb.c

@@ -769,7 +769,7 @@ static int pxa168fb_probe(struct platform_device *pdev)
 	dma_free_wc(fbi->dev, info->fix.smem_len,
 		    info->screen_base, fbi->fb_start_dma);
 failed_free_info:
-	kfree(info);
+	framebuffer_release(info);
 
 	dev_err(&pdev->dev, "frame buffer device init failed with %d\n", ret);
 	return ret;