arm-trusted-firmware-mvebu: add support for espressobin

arm-trusted-firmware-mvebu: add support for espressobin

Use build variants to cover all 11 hardware options [0]:
espressobin-512mb
espressobin-v3-v5-1gb-1cs
espressobin-v3-v5-1gb-1cs-emmc
espressobin-v3-v5-1gb-2cs
espressobin-v3-v5-1gb-2cs-emmc
espressobin-v3-v5-2gb
espressobin-v3-v5-2gb-emmc
espressobin-v7-1gb
espressobin-v7-1gb-emmc
espressobin-v7-2gb
espressobin-v7-2gb-emmc

CLOCKSPRESET is set to CPU_800_DDR_800 for all builds, which is the only
stable configuration. That actually matches what Globalscale shipped as
CPU_1000_DDR_800 combined with kernel versions < v4.19.42. [1][2].

[0] https://github.com/ARM-software/arm-trusted-firmware/blob/master/docs/plat/marvell/armada/build.rst
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8db82563451f976597ab7b282ec655e4390a4088
[2] https://forum.armbian.com/topic/10335-espressobin-update-to-585-results-in-kernel-panic/?tab=comments#comment-79916

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