[mips][msa] Added support for matching mulv, nlzc, sll, sra, srl, and subv from normal IR (i.e. not intrinsics)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190518 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][msa] Added test cases that were supposed to be part of r190507, r190509, r190512, and r190518.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190522 91177308-0d34-0410-b5e6-96231b3b80d8
Don't expose symbols of lle_ functions.

+ formatting fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190523 91177308-0d34-0410-b5e6-96231b3b80d8