* cipher/camellia-aesni-avx-amd64.S (split_nibbles)
(filter_8bit_nibbles): New.
(filter_8bit): Refactor.
(transpose_8x8b): Remove.
(camellia_f, camellia_f_core): Refactor.
(.Lsbox4_input_mask): Remove.
(__camellia_avx_setup128, __camellia_avx_setup256): Adjust for new
'camellia_f'.