[ARM] Add some missing thumb1 opcodes to enable peephole optimisation of CMPs

This adds a number of missing Thumb1 opcodes so that the peephole optimiser can
remove redundant CMP instructions.

Differential Revision: https://reviews.llvm.org/D57833


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354564 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed