uboot-imx

configs: rk3399: add gpt and fs support

To compatible with distro boot, we need to add gpt and fs support,
including gpt table and vfat, ext2, ext4 support.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>