tools/mkimage: bring back removed patches

tools/mkimage: bring back removed patches

Patches for mtk_image supporting newer SoCs have been dropped in the
process of updating mkimage to U-Boot 2022.10. While it is true that
the patches have been merged upstream a while ago, they were not merged
in time to be part of the U-Boot 2022.10 release.
See also commit 537b423d9f ("uboot-mediatek: update to U-Boot 2022.10")
which explicitly mentions that.

Fixes: 6e245777bd ("tools/mkimage: update to 2022.10")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>