drm/amd/powerplay: remove set but not used variable 'threshold', 'state'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/gpu/drm/amd/powerplay/smumgr/fiji_smumgr.c: In function fiji_populate_single_graphic_level:
drivers/gpu/drm/amd/powerplay/smumgr/fiji_smumgr.c:943:11: warning: variable threshold set but not used [-Wunused-but-set-variable]
drivers/gpu/drm/amd/powerplay/smumgr/fiji_smumgr.c: In function fiji_populate_memory_timing_parameters:
drivers/gpu/drm/amd/powerplay/smumgr/fiji_smumgr.c:1504:8: warning: variable state set but not used [-Wunused-but-set-variable]

They are introduced by commit 2e112b4a ("drm/amd/pp:
remove fiji_smc/smumgr split."), but never used,
so remove it.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/smumgr/fiji_smumgr.c

@@ -940,7 +940,7 @@ static int fiji_populate_single_graphic_level(struct pp_hwmgr *hwmgr,
 {
 	int result;
 	/* PP_Clocks minClocks; */
-	uint32_t threshold, mvdd;
+	uint32_t mvdd;
 	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
 	struct phm_ppt_v1_information *table_info =
 			(struct phm_ppt_v1_information *)(hwmgr->pptable);
@@ -973,8 +973,6 @@ static int fiji_populate_single_graphic_level(struct pp_hwmgr *hwmgr,
 	level->VoltageDownHyst = 0;
 	level->PowerThrottle = 0;
 
-	threshold = clock * data->fast_watermark_threshold / 100;
-
 	data->display_timing.min_clock_in_sr = hwmgr->display_config->min_core_set_clock_in_sr;
 
 	if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps, PHM_PlatformCaps_SclkDeepSleep))
@@ -1501,7 +1499,7 @@ static int fiji_populate_memory_timing_parameters(struct pp_hwmgr *hwmgr,
 	uint32_t dram_timing;
 	uint32_t dram_timing2;
 	uint32_t burstTime;
-	ULONG state, trrds, trrdl;
+	ULONG trrds, trrdl;
 	int result;
 
 	result = atomctrl_set_engine_dram_timings_rv770(hwmgr,
@@ -1513,7 +1511,6 @@ static int fiji_populate_memory_timing_parameters(struct pp_hwmgr *hwmgr,
 	dram_timing2 = cgs_read_register(hwmgr->device, mmMC_ARB_DRAM_TIMING2);
 	burstTime = cgs_read_register(hwmgr->device, mmMC_ARB_BURST_TIME);
 
-	state = PHM_GET_FIELD(burstTime, MC_ARB_BURST_TIME, STATE0);
 	trrds = PHM_GET_FIELD(burstTime, MC_ARB_BURST_TIME, TRRDS0);
 	trrdl = PHM_GET_FIELD(burstTime, MC_ARB_BURST_TIME, TRRDL0);