Merge tag 'mips-pull-2020-07-18' of https://gitlab.denx.de/u-boot/custodians/u-boot-mips
- MIPS: refactor cache init and setup in start.S - MIPS: sync asm header files with Linux 5.7 - MIPS: add initial support for Marvell Octeon MIPS64
- MIPS: refactor cache init and setup in start.S - MIPS: sync asm header files with Linux 5.7 - MIPS: add initial support for Marvell Octeon MIPS64