[X86] Support avx512fp16 compare instructions in the IntelInstPrinter.

This enables printing of the mnemonics that contain the predicate
in the Intel printer. This requires accounting for the memory size
that is explicitly printed in Intel syntax. Those changes have been
synced to the ATT printer as well.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D108093