hikey: Migrate to new interfaces

- Migrate to new GIC interfaces.
- Remove unused bl1_init_bl2_mem_layout().
- Migrate to bl31_early_platform_setup2().
- Use PLAT_VIRT_ADDR_SPACE_SIZE and PLAT_PHY_ADDR_SPACE_SIZE.
- Update Makefile paths.
- Remove references to removed build options.

Change-Id: Idd1e99b4864b2a72e9e12ff1fcd73d8285bc1c94
Tested-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/hisilicon/hikey/include/plat_macros.S b/plat/hisilicon/hikey/include/plat_macros.S
index 1ad217a..9f38075 100644
--- a/plat/hisilicon/hikey/include/plat_macros.S
+++ b/plat/hisilicon/hikey/include/plat_macros.S
@@ -8,7 +8,7 @@
 #define __PLAT_MACROS_S__
 
 #include <cci.h>
-#include <gic_v2.h>
+#include <gicv2.h>
 #include <hi6220.h>
 #include <platform_def.h>