[Sparc] Use HWEncoding instead of unused Num field in Sparc register definitions. Also, correct the definitions of RETL and RET instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188738 91177308-0d34-0410-b5e6-96231b3b80d8
Marking MCJIT PIC tests as XFAIL on AArch64

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188740 91177308-0d34-0410-b5e6-96231b3b80d8