amdgcn: Fix build after GDS/const AS swap in r325030

Acked-by: Aaron Watry <awatry@gmail.com>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 325866
GitOrigin-RevId: 1ad6a946762276acbc230a0f7357c55789208240
17 files changed