InstCombine: Remove a special case pattern

The special case did not work when run under -reassociate and can easily
be expressed by a further generalization of an existing pattern.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217227 91177308-0d34-0410-b5e6-96231b3b80d8
Adding kalimba variants as Triple sub-architectures.
Reviewed in:

http://reviews.llvm.org/D5115



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217229 91177308-0d34-0410-b5e6-96231b3b80d8