Pull few more MIPS fixes from Paul Burton:

 - Fix mips_get_syscall_arg() to operate on the task specified when
   detecting o32 tasks running on MIPS64 kernels.

 - Fix some incorrect GPIO pin muxing for the MT7620 SoC.

 - Update the linux-mips mailing list address.

* tag 'mips_fixes_4.20_4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MAINTAINERS: Update linux-mips mailing list address
  MIPS: ralink: Fix mt7620 nd_sd pinmux
  mips: fix mips_get_syscall_arg o32 check