uboot-imx

ARM: rmobile: Enable convenient commands on Porter

Enable cache and time commands, which are convenience tools for
doing benchmarks and various boot tests. Also enable FIT support
for booting fitImage.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>