[llvm] [MVT][TableGen] Extend Machine Value Type to `uint16_t` (PR #99657)

[Pengcheng Wang via llvm-commits]

wangpc-pp wrote:

Another NOTE: after this patch, we should reroder the MVT values and move top-128-uses MVTs ahead to reduce MatcherTable size.

https://github.com/llvm/llvm-project/pull/99657