feat(mt8196): enable APU on mt8196

Enable APU on MT8196

Change-Id: Ic746571ba3ecf9db512e26ee2f89683f2d656239
Signed-off-by: Karl Li <karl.li@mediatek.com>
diff --git a/plat/mediatek/mt8196/platform.mk b/plat/mediatek/mt8196/platform.mk
index 062735b..a16dfd1 100644
--- a/plat/mediatek/mt8196/platform.mk
+++ b/plat/mediatek/mt8196/platform.mk
@@ -25,6 +25,7 @@
 MODULES-y += $(MTK_PLAT)/common
 MODULES-y += $(MTK_PLAT)/lib/mtk_init
 MODULES-y += $(MTK_PLAT)/lib/pm
+MODULES-y += $(MTK_PLAT)/drivers/apusys
 MODULES-y += $(MTK_PLAT)/drivers/dp
 MODULES-y += $(MTK_PLAT)/drivers/mcusys
 MODULES-y += $(MTK_PLAT)/drivers/timer