MT7628N: big endian arch support

[slh]

Same answer as for your other/ related question:

AR9331: little endian arch support

There is no little endian support for ar9331, ath79 is big endian (only). Yes, mips technically could run in either endianess, but theory and practice are different stories. You can expect a world of pain, should you even try to change that (driver/ kernel bugs, bootloader oddities, and much more), While it should be theoretically possible, you really don't want to go there.

No.