camellia-gfni-avx512: remove copy-paste / leftover extra instructions
* cipher/camellia-gfni-avx512-amd64.S: Remove extranous copy-pasted instructions after `.Lbswap128_mask` constant; Remove left-over plaintext xorring in OCB encryption input loading macro.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>