arm-trusted-firmware-mediatek: update to v2.7+ from MediaTek
The updated sources bring support for the MT798x Filogic SoC family.
Add builds for MT7986 with most supported storage types, each for DDR3
and DDR4 configurations.
A better solution for skipping bad blocks on SPI-NAND connected via the
SNFI interface has been implemented upstream, so drop local patch.
Add pending patches [1] and [2] to fix boot on existing MT7622 boards.
Tested on BananaPi BPi-R64 (SDMMC, eMMC, SPI-NAND), Linksys E8450 and
Ubiquiti UniFi 6 LR as well as upcoming Bananapi BPi-R3 board for which
support will be added in future patches.
[1]: https://github.com/mtk-openwrt/arm-trusted-firmware/pulls/#3
[2]: https://github.com/mtk-openwrt/arm-trusted-firmware/pulls/#4
Signed-off-by: Daniel Golle <daniel@makrotopia.org>