[PATCH] [ARMv8] Add MC assembly/disassembly for VCVT{B,T}

[Tim Northover]

Hi Joey,

> This patch adds support for assembling/disassembling the VCVT{B,T} instructions to V8FP.

Since the docs are (as far as I'm aware) not open yet I'm going to
assume you've got the bits correct (if you could reassure me that
you've run MCHammer over the range that'd be very friendly!).

Other than that it seems structurally reasonable, except that you
don't seem to use the ADuInp class in this patch. Might be best to
save it until you do.

Cheers.

Tim.