[X86] Remove 'NOREX' comment from the printing of _NOREX instructions.

Some of the NOREX instructions are used in 32-bit mode making this printing confusing. It also doesn't provide a lot of value since you can see the h-register being used by the instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323174 91177308-0d34-0410-b5e6-96231b3b80d8
11 files changed