mediatek: mt8183: add MTK SPM driver

Add MTK SPM driver for suspend/resume scenario.

Change-Id: I8207eea95914da9e63c62f3afc8329f3ccd9a22c
diff --git a/plat/mediatek/mt8183/drivers/pmic/pmic.h b/plat/mediatek/mt8183/drivers/pmic/pmic.h
index d62c6da..f19f9f6 100644
--- a/plat/mediatek/mt8183/drivers/pmic/pmic.h
+++ b/plat/mediatek/mt8183/drivers/pmic/pmic.h
@@ -10,7 +10,11 @@
 enum {
 	PMIC_TMA_KEY = 0x03a8,
 	PMIC_PWRHOLD = 0x0a08,
-	PMIC_PSEQ_ELR11 = 0x0a62
+	PMIC_PSEQ_ELR11 = 0x0a62,
+	PMIC_VPROC11_CON0 = 0x1388,
+	PMIC_VPROC11_OP_EN = 0x1390,
+	PMIC_VSRAM_PROC11_CON0 = 0x1b46,
+	PMIC_VSRAM_PROC11_OP_EN = 0x1b4e
 };
 
 enum {
@@ -18,6 +22,8 @@
 };
 
 /* external API */
+void bcpu_enable(uint32_t en);
+void bcpu_sram_enable(uint32_t en);
 void wk_pmic_enable_sdn_delay(void);
 void pmic_power_off(void);