CODE_OWNERS: Take ownership of the MIPS backend

As agreed with Daniel Sanders, I'm taking over as code owner
for the MIPS backend.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276529 91177308-0d34-0410-b5e6-96231b3b80d8

CODE_OWNERS.TXT

@@ -50,6 +50,10 @@ N: Quentin Colombet
 E: [email protected]
 D: Register allocators
 
+N: Simon Dardis
+E: [email protected]
+D: MIPS Backend (lib/Target/Mips/*)
+
 N: Duncan P. N. Exon Smith
 E: [email protected]
 D: Branch weights and BlockFrequencyInfo
@@ -155,10 +159,6 @@ N: Nadav Rotem
 E: [email protected]
 D: X86 Backend, Loop Vectorizer
 
-N: Daniel Sanders
-E: [email protected]
-D: MIPS Backend (lib/Target/Mips/*)
-
 N: Duncan Sands
 E: [email protected]
 D: DragonEgg