drm/amd/powerplay: delete duplicate code in smu7_hwmgr.c

Voltage Controller have been enabled (SMC message)
before ULV enablement.
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NRex Zhu <Rex.Zhu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -993,13 +993,6 @@ static int smu7_start_dpm(struct pp_hwmgr *hwmgr)
 	PHM_WRITE_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__PCIE,
 			SWRST_COMMAND_1, RESETLC, 0x0);
 
-	PP_ASSERT_WITH_CODE(
-			(0 == smum_send_msg_to_smc(hwmgr->smumgr,
-					PPSMC_MSG_Voltage_Cntl_Enable)),
-			"Failed to enable voltage DPM during DPM Start Function!",
-			return -EINVAL);
-
-
 	if (smu7_enable_sclk_mclk_dpm(hwmgr)) {
 		printk(KERN_ERR "Failed to enable Sclk DPM and Mclk DPM!");
 		return -EINVAL;