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/include/plat_macros.S b/plat/mediatek/mt8192/include/plat_macros.S
index 92cda07..7d17e36 100644
--- a/plat/mediatek/mt8192/include/plat_macros.S
+++ b/plat/mediatek/mt8192/include/plat_macros.S
@@ -24,8 +24,8 @@
 	.asciz "cci_snoop_ctrl_cluster0", "cci_snoop_ctrl_cluster1" , ""
 
 	/* ---------------------------------------------
-	 * The below macro prints out relevant GIC and
-	 * CCI registers whenever an unhandled exception
+	 * The below macro prints out relevant GIC
+	 * registers whenever an unhandled exception
 	 * is taken in BL31.
 	 * Clobbers: x0 - x10, x26, x27, sp
 	 * ---------------------------------------------