feat(mediatek): add APU bootup control smc call

Add APU bootup control smc call.
The steps of bootup flow:
  1. set up APU config.
  2. reset APU.
  3. set up APU boot config.
  4. boot APU.

Change-Id: I9e930070a64c7c4dcaa3a8b3d28b897823e9f53c
diff --git a/plat/mediatek/mt8188/include/platform_def.h b/plat/mediatek/mt8188/include/platform_def.h
index e72034c..29e4d21 100644
--- a/plat/mediatek/mt8188/include/platform_def.h
+++ b/plat/mediatek/mt8188/include/platform_def.h
@@ -28,7 +28,10 @@
  * APUSYS related constants
  ******************************************************************************/
 #define BCRM_FMEM_PDN_BASE	(IO_PHYS + 0x00276000)
+#define APU_MD32_SYSCTRL	(IO_PHYS + 0x09001000)
+#define APU_MD32_WDT		(IO_PHYS + 0x09002000)
 #define APU_RCX_CONFIG		(IO_PHYS + 0x09020000)
+#define APU_REVISER		(IO_PHYS + 0x0903c000)
 #define APU_RCX_VCORE_CONFIG	(IO_PHYS + 0x090e0000)
 #define APU_MBOX0		(IO_PHYS + 0x090e1000)
 #define APU_MBOX1		(IO_PHYS + 0x090e2000)