mediatek: mt8192: add GIC600 support

1. Implement GIC600 driver support and init
2. Remove unused debug info

Change-Id: I30c08c531e705debc029071e4e970048e261c386
diff --git a/plat/mediatek/mt8192/bl31_plat_setup.c b/plat/mediatek/mt8192/bl31_plat_setup.c
index 4378c5a..f965281 100644
--- a/plat/mediatek/mt8192/bl31_plat_setup.c
+++ b/plat/mediatek/mt8192/bl31_plat_setup.c
@@ -15,6 +15,7 @@
 #include <lib/coreboot.h>
 
 /* Platform Includes */
+#include <mt_gic_v3.h>
 #include <plat_params.h>
 #include <plat_private.h>
 
@@ -79,6 +80,9 @@
  ******************************************************************************/
 void bl31_platform_setup(void)
 {
+	/* Initialize the GIC driver, CPU and distributor interfaces */
+	mt_gic_driver_init();
+	mt_gic_init();
 }
 
 /*******************************************************************************