fbdev: ep93xx-fb: Add missing clk_disable_unprepare in ep93xxfb_probe()

The clk_disable_unprepare() should be called in the error handling
of register_framebuffer(), fix it.

Fixes: 0937a7b3625d ("video: ep93xx: Prepare clock before using it")
Signed-off-by: Gaosheng Cui <[e-mail]>
Signed-off-by: Helge Deller <[e-mail]>

drivers/video/fbdev/ep93xx-fb.c

···
 
 	err = register_framebuffer(info);
 	if (err)
-		goto failed_check;
+		goto failed_framebuffer;
 
 	dev_info(info->dev, "registered. Mode = %dx%d-%d\n",
 		 info->var.xres, info->var.yres, info->var.bits_per_pixel);
 	return 0;
 
+failed_framebuffer:
+	clk_disable_unprepare(fbi->clk);
 failed_check:
 	if (fbi->mach_info->teardown)
 		fbi->mach_info->teardown(pdev);