drm/amdgpu/gfx12: fix IP version check

Use the helper function rather than reading it directly.

Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit f1fd1d0)
Cc: stable@vger.kernel.org

Author: alexdeucher

drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c

@@ -4123,7 +4123,7 @@ static int gfx_v12_0_set_clockgating_state(void *handle,
 	if (amdgpu_sriov_vf(adev))
 		return 0;
 
-	switch (adev->ip_versions[GC_HWIP][0]) {
+	switch (amdgpu_ip_version(adev, GC_HWIP, 0)) {
 	case IP_VERSION(12, 0, 0):
 	case IP_VERSION(12, 0, 1):
 		gfx_v12_0_update_gfx_clock_gating(adev,