llvm-objdump: Split printCOFFUnwindInfo into small functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202772 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "[AArch64] This is a work in progress to provide a machine description"

This reverts commit ff717c8fc786a0cfa1602982b91895fa09e514fc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202773 91177308-0d34-0410-b5e6-96231b3b80d8