drm/amd/powerplay:add hwmgr callback to update nbpstate on Carrizo

Add hwmgr callback "update_nbdpm_pstate".This will use to access
"cz_nbdpm_pstate_enable_disable" function to enable/disable low
memory pstate.

Signed-off-by: suresh guttula <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/powerplay/hwmgr/smu8_hwmgr.c

···
 	.power_state_set = smu8_set_power_state_tasks,
 	.dynamic_state_management_disable = smu8_disable_dpm_tasks,
 	.notify_cac_buffer_info = smu8_notify_cac_buffer_info,
+	.update_nbdpm_pstate = smu8_nbdpm_pstate_enable_disable,
 	.get_thermal_temperature_range = smu8_get_thermal_temperature_range,
 };
 

drivers/gpu/drm/amd/powerplay/inc/hwmgr.h

···
 					uint32_t mc_addr_low,
 					uint32_t mc_addr_hi,
 					uint32_t size);
+	int (*update_nbdpm_pstate)(struct pp_hwmgr *hwmgr,
+					bool enable,
+					bool lock);
 	int (*get_thermal_temperature_range)(struct pp_hwmgr *hwmgr,
 					struct PP_TemperatureRange *range);
 	int (*get_power_profile_mode)(struct pp_hwmgr *hwmgr, char *buf);