Revert "[AArch64] Enable CRC feature in GAS for cortex-a53 and cortex-a57."

This reverts commit f460784869eb8134c6e9cf09261df45f2107b063.
[AArch64] Add CRC feature for cortex-A53 and cortex-A57.

Apply trunk patch:
      * config/tc-aarch64.c (aarch64_cpus): Add CRC feature for
        cortex-A53 and cortex-A57.