drm/amdgpu: add mode2 reset support for vangogh

GPU reset is handled via SMU similar to previous APUs.
Acked-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>

drivers/gpu/drm/amd/pm/swsmu/smu11/vangogh_ppt.c

@@ -1562,6 +1562,11 @@ static int vangogh_post_smu_init(struct smu_context *smu)
 	}
 }
 
+static int vangogh_mode2_reset(struct smu_context *smu)
+{
+	return smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_GfxDeviceDriverReset, SMU_RESET_MODE_2, NULL);
+}
+
 static const struct pptable_funcs vangogh_ppt_funcs = {
 
 	.check_fw_status = smu_v11_0_check_fw_status,
@@ -1596,6 +1601,7 @@ static const struct pptable_funcs vangogh_ppt_funcs = {
 	.force_clk_levels = vangogh_force_clk_levels,
 	.set_performance_level = vangogh_set_performance_level,
 	.post_init = vangogh_post_smu_init,
+	.mode2_reset = vangogh_mode2_reset,
 };
 
 void vangogh_set_ppt_funcs(struct smu_context *smu)