Following on from "x86-64: enhancements to GOTPCREL / GOTTPOFF handling".
1: drop redundant i.operands checks from output_disp()
2: tighten convert-load-reloc checking
3: widen @got{,pcrel} support to PUSH and APX IMUL
4: further tighten convert-load-reloc checking
5: restrict use of GOT32X relocs
Jan