[Hexagon] Add extenders for GD_PLT_B22_PCREL and LD_PLT_B22_PCREL

Patch by Sid Manning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301955 91177308-0d34-0410-b5e6-96231b3b80d8
9 files changed