Add extra new line and remove some trailing whitespace from tablegen RegisterInfo output file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222508 91177308-0d34-0410-b5e6-96231b3b80d8
Remove a bunch of unnecessary typecasts to 'const TargetRegisterClass *'

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222509 91177308-0d34-0410-b5e6-96231b3b80d8