drm/amd/pm: set VCN pg per instances

When deciding whether to set pg for vcn1, instances
number is more generic than chip name.
Signed-off-by: NJiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: NTao Zhou <tao.zhou1@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c

@@ -776,7 +776,7 @@ static int sienna_cichlid_dpm_set_vcn_enable(struct smu_context *smu, bool enabl
 			ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_PowerUpVcn, 0, NULL);
 			if (ret)
 				return ret;
-			if (adev->asic_type == CHIP_SIENNA_CICHLID) {
+			if (adev->vcn.num_vcn_inst > 1) {
 				ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_PowerUpVcn,
 								  0x10000, NULL);
 				if (ret)
@@ -788,7 +788,7 @@ static int sienna_cichlid_dpm_set_vcn_enable(struct smu_context *smu, bool enabl
 			ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_PowerDownVcn, 0, NULL);
 			if (ret)
 				return ret;
-			if (adev->asic_type == CHIP_SIENNA_CICHLID) {
+			if (adev->vcn.num_vcn_inst > 1) {
 				ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_PowerDownVcn,
 								  0x10000, NULL);
 				if (ret)