[ROCm] fix driver name in conformance tests

experimental/rocm/cts/CMakeLists.txt

diff --git a/experimental/rocm/cts/CMakeLists.txt b/experimental/rocm/cts/CMakeLists.txt
index 2aff703..7ee3c3a 100644
--- a/experimental/rocm/cts/CMakeLists.txt
+++ b/experimental/rocm/cts/CMakeLists.txt
@@ -6,7 +6,7 @@
 
 iree_hal_cts_test_suite(
   DRIVER_NAME
-    experimental_rocm
+    rocm
   DRIVER_REGISTRATION_HDR
     "experimental/rocm/registration/driver_module.h"
   DRIVER_REGISTRATION_FN