Warnings were:
dyngen.c:292: error: ‘pstrcpy’ defined but not used
Only used with CONFIG_FORMAT_COFF
dyngen.c:319: error: ‘swab32ss’ defined but not used
With ELF_USES_RELOCA, either swab32ss() or swab64ss() will
be used depending on ELF_CLASS. Easier to just mark them
both as unused.
dyngen.c:334: error: ‘get16’ defined but not used
dyngen.c:343: error: ‘get32’ defined but not used
dyngen.c:352: error: ‘put16’ defined but not used
dyngen.c:359: error: ‘put32’ defined but not used
Maybe be used for some host arches; easiest to mark them as
unused.
dyngen.c:425: error: ‘elf_swap_phdr’ defined but not used
This one is completely unused; just delete.