CODE_OWNERS: Take ownership of the MIPS backend

As agreed with Simon Dardis, I'm taking over as a code owner
for the MIPS backend.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335213 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed