drm/amd/powerplay: SCLK will have a big drop with low VDDC when PPlib was enabled.

SMC uses CurrSclkPllRange structure to keep track of what range of
PLL SCLK is sitting on.  Driver overwrites this value to 0 because
it's part of DPM table and driver doesn't program this.
This change will set this field to 0xFF every time there's a
init SMC table call.
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c

@@ -2091,7 +2091,7 @@ static int polaris10_init_smc_table(struct pp_hwmgr *hwmgr)
 				"Failed to populate Clock Stretcher Data Table!",
 				return result);
 	}
-
+	table->CurrSclkPllRange = 0xff;
 	table->GraphicsVoltageChangeEnable  = 1;
 	table->GraphicsThermThrottleEnable  = 1;
 	table->GraphicsInterval = 1;
@@ -2184,6 +2184,7 @@ static int polaris10_init_smc_table(struct pp_hwmgr *hwmgr)
 	CONVERT_FROM_HOST_TO_SMC_UL(table->SmioMask1);
 	CONVERT_FROM_HOST_TO_SMC_UL(table->SmioMask2);
 	CONVERT_FROM_HOST_TO_SMC_UL(table->SclkStepSize);
+	CONVERT_FROM_HOST_TO_SMC_UL(table->CurrSclkPllRange);
 	CONVERT_FROM_HOST_TO_SMC_US(table->TemperatureLimitHigh);
 	CONVERT_FROM_HOST_TO_SMC_US(table->TemperatureLimitLow);
 	CONVERT_FROM_HOST_TO_SMC_US(table->VoltageResponseTime);