drm/amd/powerplay: remove unnecessary checking in smu_hw_fini

This patch removes unnecessary NULL pointer checking in smu_hw_fini, because
kfree is able to handle NULL pointer case.
Suggested-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -683,40 +683,26 @@ static int smu_hw_fini(void *handle)
 	if (!is_support_sw_smu(adev))
 		return -EINVAL;
 
-	if (table_context->driver_pptable) {
 	kfree(table_context->driver_pptable);
 	table_context->driver_pptable = NULL;
-	}
 
-	if (table_context->max_sustainable_clocks) {
 	kfree(table_context->max_sustainable_clocks);
 	table_context->max_sustainable_clocks = NULL;
-	}
 
-	if (table_context->od_feature_capabilities) {
 	kfree(table_context->od_feature_capabilities);
 	table_context->od_feature_capabilities = NULL;
-	}
 
-	if (table_context->od_settings_max) {
 	kfree(table_context->od_settings_max);
 	table_context->od_settings_max = NULL;
-	}
 
-	if (table_context->od_settings_min) {
 	kfree(table_context->od_settings_min);
 	table_context->od_settings_min = NULL;
-	}
 
-	if (table_context->overdrive_table) {
 	kfree(table_context->overdrive_table);
 	table_context->overdrive_table = NULL;
-	}
 
-	if (table_context->od8_settings) {
 	kfree(table_context->od8_settings);
 	table_context->od8_settings = NULL;
-	}
 
 	ret = smu_fini_fb_allocations(smu);
 	if (ret)