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/include/platform_def.h b/plat/mediatek/mt8195/include/platform_def.h
index 73f609a..59f0284 100644
--- a/plat/mediatek/mt8195/include/platform_def.h
+++ b/plat/mediatek/mt8195/include/platform_def.h
@@ -37,6 +37,13 @@
 #define SYS_COUNTER_FREQ_IN_MHZ		13
 
 /*******************************************************************************
+ * GIC-600 & interrupt handling related constants
+ ******************************************************************************/
+/* Base MTK_platform compatible GIC memory map */
+#define BASE_GICD_BASE			MT_GIC_BASE
+#define MT_GIC_RDIST_BASE		(MT_GIC_BASE + 0x40000)
+
+/*******************************************************************************
  * Platform binary types for linking
  ******************************************************************************/
 #define PLATFORM_LINKER_FORMAT		"elf64-littleaarch64"