amdgpu/half_rsqrt: Switch implementation to native_rsqrt

Reviewer: Tom Stellard <tstellar@redhat.com>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 325053
GitOrigin-RevId: aad28681c2198833d6ac2dcbb8ba1de5cffd8508
3 files changed