[ARM] Formatting for ARMInstrMVE.td. NFC
[ARM] Formatting for ARMInstrMVE.td. NFC

This is just some formatting cleanup, prior to the masked load and store patch
in D66534.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@369545 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm