[Mips] Fix for decoding DINS instruction - disassembler

This patch fixes decoding of size and position for DINSM
and DINSU instructions.

Differential Revision: https://reviews.llvm.org/D31072


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298593 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed