mips-fixes-for-2019.01

Daniel Schwierzeck

@schwierd

1410708e · bmips: bcm6838: fix device tree warning · Dec 10, 2018

- mips: bcm: disable CONFIG_SWAP_IO_SPACE to force native endianess in readl() & co.
  this fixes 09ace9161b95ad3a04b33d1d6a65a929901d28c8
- mips: bcm6838: fix device tree warning