[DynInst_API:] [dyninst/dyninst] 1860d6: Fix overflow of fields in instruction layout

[bbiiggppiigg <noreply@xxxxxxxxxx>]

  Branch: refs/heads/fix-layout-field-overflow
  Home:   https://github.com/dyninst/dyninst
  Commit: 1860d6c38b505b0eee2d92c74895919ff9c902d0
      https://github.com/dyninst/dyninst/commit/1860d6c38b505b0eee2d92c74895919ff9c902d0
  Author: wuxx1279 <bbiiggppiigg@xxxxxxxxx>
  Date:   2023-08-09 (Wed, 09 Aug 2023)

  Changed paths:
    M instructionAPI/src/AMDGPU/gfx908/amdgpu_gfx908_decoder_impl.h
    M instructionAPI/src/AMDGPU/gfx90a/amdgpu_gfx90a_decoder_impl.h

  Log Message:
  -----------
  Fix overflow of fields in instruction layout

Fields in instruction layouts can have implicit LSBs.
Previously this wasn't taken into consideration,
and causes overflow and decoding instruction.

This PR fixes the layout definition to include the LSBs.