feat(mt8188): add EMI MPU basic drivers

EMI MPU stands for external memory interface memory protect unit.
MT8188 supports 32 regions and 16 domains.

Change-Id: I9bbeb355665401cc71dda6db22157d9d751570d1
diff --git a/plat/mediatek/include/mt8188/platform_def.h b/plat/mediatek/include/mt8188/platform_def.h
index 962d952..aed5ee5 100644
--- a/plat/mediatek/include/mt8188/platform_def.h
+++ b/plat/mediatek/include/mt8188/platform_def.h
@@ -101,6 +101,12 @@
 #define DP_SEC_SIZE		(0x1000)
 
 /*******************************************************************************
+ * EMI MPU related constants
+ *******************************************************************************/
+#define EMI_MPU_BASE		(IO_PHYS + 0x00226000)
+#define SUB_EMI_MPU_BASE	(IO_PHYS + 0x00225000)
+
+/*******************************************************************************
  * System counter frequency related constants
  ******************************************************************************/
 #define SYS_COUNTER_FREQ_IN_HZ	(13000000)