tests/amdgpu: fix a amdgpu_test hang issue on some platforms.

The computer ring test name mis-match in different files, thus may be set with TRUE on wrong platforms.

Change-Id: I0b918ff8faf08c9c9f1ad55f4dcd18f66b956901 Signed-off-by: Yifan Zhang yifan1.zhang@amd.com