* aes-internal.h (struct aes_table): Renamed the shift_idx field

to sparc_idx, as it will be tweaked to improve the sparc code.
Also reduced its size to [2][4].
(IDX_FACTOR): Deleted constant.
* aes-encrypt-table.c (_aes_encrypt_table): Adapted initializer of
sparc_idx.
* aes-decrypt-table.c (_aes_decrypt_table): Likewise.
* asm.m4: Deleted AES_SIDX2, to match struct aes_table.

Rev: src/nettle/aes-decrypt-table.c:1.2
Rev: src/nettle/aes-encrypt-table.c:1.2
Rev: src/nettle/aes-internal.h:1.7
Rev: src/nettle/asm.m4:1.9