AMDGPU: Relax SGPR asm constraint register class

s should be SReg_32 to be as general as possible. This can avoid a copy
from m0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280154 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed