feat(mt8188): add emi mpu protection for APU secure memory

Add emi mpu protection of APU secure memory.

Change-Id: I949cfce97565d8a313caae4ea41af60a171042a6
diff --git a/plat/mediatek/drivers/apusys/apusys.h b/plat/mediatek/drivers/apusys/apusys.h
index 2a9bffb..acc658d 100644
--- a/plat/mediatek/drivers/apusys/apusys.h
+++ b/plat/mediatek/drivers/apusys/apusys.h
@@ -18,6 +18,7 @@
 	MTK_APUSYS_KERNEL_OP_APUSYS_RV_START_MP,	/*  5 */
 	MTK_APUSYS_KERNEL_OP_APUSYS_RV_STOP_MP,		/*  6 */
 	MTK_APUSYS_KERNEL_OP_DEVAPC_INIT_RCX,		/*  7 */
+	MTK_APUSYS_KERNEL_OP_APUSYS_RV_SETUP_SEC_MEM,	/*  8 */
 	MTK_APUSYS_KERNEL_OP_NUM,
 };