mediatek: mt8192: Add Vcore DVFS driver

Change-Id: I4bd4612a7c7727a5be70957ae940e5f51c7ca5e6
diff --git a/plat/mediatek/mt8192/drivers/spm/mt_spm_internal.h b/plat/mediatek/mt8192/drivers/spm/mt_spm_internal.h
index fd30943..1d0f783 100644
--- a/plat/mediatek/mt8192/drivers/spm/mt_spm_internal.h
+++ b/plat/mediatek/mt8192/drivers/spm/mt_spm_internal.h
@@ -594,6 +594,9 @@
 extern void __spm_clean_after_wakeup(void);
 extern wake_reason_t
 __spm_output_wake_reason(int state_id, const struct wake_status *wakesta);
+extern void
+__spm_sync_vcore_dvfs_power_control(struct pwr_ctrl *dest_pwr_ctrl,
+				    const struct pwr_ctrl *src_pwr_ctrl);
 extern void __spm_set_pcm_wdt(int en);
 extern uint32_t _spm_get_wake_period(int pwake_time, wake_reason_t last_wr);
 extern void __spm_set_fw_resume_option(struct pwr_ctrl *pwrctrl);