[TableGen,X86] Remove extra optional operand from RawFrm. RawFrm with 2 immediates is handled by RawFrmImm8/RawFrmImm16.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@261187 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed