Match new shuffle codegen for MOVHPD patterns

Add patterns to match SSE (shufpd) and AVX (vpermilpd) shuffle codegen
when storing the high element of a v2f64. The existing patterns were
only checking for an unpckh type of shuffle. 

http://llvm.org/bugs/show_bug.cgi?id=21791

Differential Revision: http://reviews.llvm.org/D6586



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223929 91177308-0d34-0410-b5e6-96231b3b80d8