arm-trusted-firmware-mvebu: switch to CZ.NIC's Secure Firmware

arm-trusted-firmware-mvebu: switch to CZ.NIC's Secure Firmware

CZ.NIC as part of Turris project released free and open source WTMI
application firmware wtmi_app.bin for all Armada 3720 devices.

This firmware includes additional features like access to Hardware
Random Number Generator of Armada 3720 SoC which original Marvell's
fuse.bin image does not have.

Add a patch which allows to pass the commit id, so the firmware is able
to identify itself, see a04bffeb.
Add a patch to disable linking with gold, since the ARM toolchain
doesn't ship gold.
Cherry-pick the 3 post-release fixes.

Signed-off-by: Andre Heider <a.heider@gmail.com>