[binutils-gdb] Revert "[AArch64] Allow COPY relocation elimination"

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT dbb2bcd0059f8d91de5a792f8684c8908c316720 ***

Author: Jiong Wang <jiong.wang@arm.com>
Branch: master
Commit: dbb2bcd0059f8d91de5a792f8684c8908c316720

Revert "[AArch64] Allow COPY relocation elimination"

This reverts commit bc327528fd2ccdc6c29ab6ae608085dddbad5cc8.

This patch can only be committed after PC-relative relocation types
support on copy relocation elimination is also completed.