[CodeGen][InlineSpiller] Enable subreg spill-restore during RA#526

cdevadas wants to merge 2 commits intoamd-stagingROCm/llvm-project:amd-stagingfrom

amd/dev/cdevadas/amd-staging/subreg-spill-restoreROCm/llvm-project:amd/dev/cdevadas/amd-staging/subreg-spill-restoreCopy head branch name to clipboard