[Mips][msa] Added most builtins from add.a to xori

[Mips][msa] Added most builtins from add.a to xori

Includes:
add.a, adds_a, adds_s, adds_u, addv, addvi, andi.b, asub_[su], ave_[su],
aver_[su], bclr, bclri, bins[lr], bins[lr]i, bmnzi, bmzi, bneg, bnegi, bset,
bseti, c(eq|ne), c(eq|ne)i, cl[et]_[su], cl[et]i_[su], copy_[su].[bhw],
div_[su], dotp_[su], dpadd_[su], dpsub_[su], fadd, fceq, fclass, fcl[et], fcne,
fdiv, fexp2, ffint_[su], ffql, ffqr, fill, flog2, fmadd, fmax, fmax_a, fmin,
fmin_a, fmsub, fmul, frint, fseq, fsle, fslt, fsne, fsqr, fsub, ftint_[su],
ftq, ilvev, ilvl, ilvod, ilvr, ldi, frcp, frsqrt, madd_q, maddr_q, maddv,
max_[asu], maxi_[su], min_[asu], mini_[su], mod_[su], msub_q, msubr_q, msubv,
mul_q, mulr_q, mulv, nloc, nlzc, nori, ori, pckev, pckod, pcnt, sat_[su], shf,
sld, sldi, sll, slli, splat, splati, sr[al], sr[al]i, subs_[su], subv, subvi,
xori

Patch by Daniel Sanders

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188461 91177308-0d34-0410-b5e6-96231b3b80d8