[PATCH 0/5] x86: re-work VEX-3-sources logic in build_modrm_byte()

[Jan Beulich]

Originally I had meant to only drop VexImmExt, but a few more transformations
seem at least desirable.

1: drop dead code from build_modrm_byte()
2: tighten assertion in build_modrm_byte()
3: drop VexImmExt
4: move and fold common code in build_modrm_byte()
5: fix indentation in build_modrm_byte()

Jan