feat(mt8188): initialize systimer

Add systimer to support timer function.

TEST=build pass
BUG=b:236331724

Change-Id: Ibe6b96a162caa8804bebb7ff7de326ebcb2a6daa
diff --git a/plat/mediatek/drivers/timer/rules.mk b/plat/mediatek/drivers/timer/rules.mk
new file mode 100644
index 0000000..005cf45
--- /dev/null
+++ b/plat/mediatek/drivers/timer/rules.mk
@@ -0,0 +1,14 @@
+#
+# Copyright (c) 2022, MediaTek Inc. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+LOCAL_DIR := $(call GET_LOCAL_DIR)
+
+MODULE := timer
+LOCAL_SRCS-y := $(LOCAL_DIR)/mt_timer.c
+
+PLAT_INCLUDES += -I${LOCAL_DIR}
+
+$(eval $(call MAKE_MODULE,$(MODULE),$(LOCAL_SRCS-y),$(MTK_BL)))