mips-pull-2020-06-29

Daniel Schwierzeck

@schwierd

e35c2a8f · .azure-pipelines.yml: add Qemu tests for MIPS Malta board · Jun 29, 2020

- net: pcnet: cleanup and add DM support
- Makefile: add rule to build an endian-swapped U-Boot image
  used by MIPS Malta EL variants
- CI: add Qemu tests for MIPS Malta