drm/amd/pm/powerplay/smumgr/fiji_smumgr: Remove unused variable 'result'

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/smumgr/fiji_smumgr.c: In function ‘fiji_populate_smc_boot_level’:
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/smumgr/fiji_smumgr.c:1603:6: warning: variable ‘result’ set but not used [-Wunused-but-set-variable]

Cc: Evan Quan <evan.quan@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1600,20 +1600,19 @@ static int fiji_populate_smc_uvd_level(struct pp_hwmgr *hwmgr,
 static int fiji_populate_smc_boot_level(struct pp_hwmgr *hwmgr,
 		struct SMU73_Discrete_DpmTable *table)
 {
-	int result = 0;
 	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
 
 	table->GraphicsBootLevel = 0;
 	table->MemoryBootLevel = 0;
 
 	/* find boot level from dpm table */
-	result = phm_find_boot_level(&(data->dpm_table.sclk_table),
-			data->vbios_boot_state.sclk_bootup_value,
-			(uint32_t *)&(table->GraphicsBootLevel));
+	phm_find_boot_level(&(data->dpm_table.sclk_table),
+			    data->vbios_boot_state.sclk_bootup_value,
+			    (uint32_t *)&(table->GraphicsBootLevel));
 
-	result = phm_find_boot_level(&(data->dpm_table.mclk_table),
-			data->vbios_boot_state.mclk_bootup_value,
-			(uint32_t *)&(table->MemoryBootLevel));
+	phm_find_boot_level(&(data->dpm_table.mclk_table),
+			    data->vbios_boot_state.mclk_bootup_value,
+			    (uint32_t *)&(table->MemoryBootLevel));
 
 	table->BootVddc  = data->vbios_boot_state.vddc_bootup_value *
 			VOLTAGE_SCALE;