Revert "[AArch64][RegisterBankInfo] Use the statically computed mappings for COPY"

This reverts commit r315781, breaks:
http://green.lab.llvm.org/green/job/Compiler_Verifiers_GlobalISEL/9882

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315823 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed