crypto: use byteswap * lib/md4.c, lib/md5.c, lib/sha1.c, lib/sha256.c, lib/sha512.c: * lib/sm3.c: Include <byteswap.h>. (SWAP): Use its macros rather than reinventing the wheel. * modules/crypto/md4, modules/crypto/md5-buffer: * modules/crypto/sha1-buffer, modules/crypto/sha256-buffer: * modules/crypto/sha512-buffer, modules/crypto/sm3: (Depends-on): Add byteswap.