ATF bl2 comes in 4 variants for MT7622 depending on the boot media:
* nor
* snand
* emmc
* sdmmc
Additional binary headers needed for emmc and sdmmc are downloaded as
well and provided along with bl2*.bin and bl31.bin to allow building
images including ATF for MT7622.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: maurerr <mariusd84@gmail.com>