drm/amdgpu/mmhub4.1: 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 63bfd24)
Cc: stable@vger.kernel.org

Author: alexdeucher

drivers/gpu/drm/amd/amdgpu/mmhub_v4_1_0.c

@@ -108,7 +108,7 @@ mmhub_v4_1_0_print_l2_protection_fault_status(struct amdgpu_device *adev,
 	dev_err(adev->dev,
 		"MMVM_L2_PROTECTION_FAULT_STATUS_LO32:0x%08X\n",
 		status);
-	switch (adev->ip_versions[MMHUB_HWIP][0]) {
+	switch (amdgpu_ip_version(adev, MMHUB_HWIP, 0)) {
 	case IP_VERSION(4, 1, 0):
 		mmhub_cid = mmhub_client_ids_v4_1_0[cid][rw];
 		break;