Remove obsolete code from MipsAsmParser.cpp.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190396 91177308-0d34-0410-b5e6-96231b3b80d8
Add test cases for Mips mthc1/mfhc1 instructions. Add check for odd value of register when PFU is 32 bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190397 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][msa] Removed unsupported dot product instructions (dotp_[su].b)

The dotp_[su].b instructions never existed in any revision of the MSA spec.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190398 91177308-0d34-0410-b5e6-96231b3b80d8