drm/amdgpu/powerplay/smu7: fix static checker warning

Casting of voltage values to a larger size results in
overwriting adjacent memory in the structure.
Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c

@@ -2129,13 +2129,16 @@ static int smu7_patch_acp_vddc(struct pp_hwmgr *hwmgr,
 static int smu7_patch_limits_vddc(struct pp_hwmgr *hwmgr,
 				  struct phm_clock_and_voltage_limits *tab)
 {
+	uint32_t vddc, vddci;
 	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
 
 	if (tab) {
-		smu7_patch_ppt_v0_with_vdd_leakage(hwmgr, (uint32_t *)&tab->vddc,
+		smu7_patch_ppt_v0_with_vdd_leakage(hwmgr, &vddc,
 						   &data->vddc_leakage);
-		smu7_patch_ppt_v0_with_vdd_leakage(hwmgr, (uint32_t *)&tab->vddci,
+		tab->vddc = vddc;
+		smu7_patch_ppt_v0_with_vdd_leakage(hwmgr, &vddci,
 						   &data->vddci_leakage);
+		tab->vddci = vddci;
 	}
 
 	return 0;