mediatek: mt8195: initialize GIC

MT8192 GIC driver can be shared with MT8195. Move GIC driver to common
and do the initialization.

Signed-off-by: christine.zhu <christine.zhu@mediatek.corp-partner.google.com>
Change-Id: I63f3e668b5ca6df8bcf17b5cd4d53fa84f330fed
diff --git a/plat/mediatek/mt8195/platform.mk b/plat/mediatek/mt8195/platform.mk
index c89ca90..08dcfa2 100644
--- a/plat/mediatek/mt8195/platform.mk
+++ b/plat/mediatek/mt8195/platform.mk
@@ -8,8 +8,10 @@
 MTK_PLAT_SOC := ${MTK_PLAT}/${PLAT}
 
 PLAT_INCLUDES := -I${MTK_PLAT}/common/                            \
+                 -I${MTK_PLAT}/common/drivers/gic600/             \
                  -I${MTK_PLAT_SOC}/include/
 
+GICV3_SUPPORT_GIC600        :=      1
 include drivers/arm/gic/v3/gicv3.mk
 include lib/xlat_tables_v2/xlat_tables.mk
 
@@ -25,6 +27,7 @@
                 lib/cpus/aarch64/cortex_a55.S                         \
                 lib/cpus/aarch64/cortex_a78.S                         \
                 plat/common/plat_gicv3.c                              \
+                ${MTK_PLAT}/common/drivers/gic600/mt_gic_v3.c         \
                 ${MTK_PLAT}/common/mtk_plat_common.c                  \
                 ${MTK_PLAT}/common/params_setup.c                     \
                 ${MTK_PLAT_SOC}/aarch64/platform_common.c             \