plat/arm/sgi: refactor header file inclusions

Upcoming RD platforms have deviations in various definitions of
platform macros from that of the exisiting platforms. In preparation
for adding support for those upcoming RD platforms, refactor the
header file inclusion to allow newer platforms to use a different
set of platform macros.

Change-Id: Ic80283ddadafaa7f766f300652cb0d4e507efdb6
Signed-off-by: Aditya Angadi <aditya.angadi@arm.com>
diff --git a/plat/arm/board/rde1edge/include/platform_def.h b/plat/arm/board/rde1edge/include/platform_def.h
index 3fb6409..c39fe2b 100644
--- a/plat/arm/board/rde1edge/include/platform_def.h
+++ b/plat/arm/board/rde1edge/include/platform_def.h
@@ -9,7 +9,7 @@
 
 #include <lib/utils_def.h>
 
-#include <sgi_base_platform_def.h>
+#include <sgi_soc_platform_def.h>
 
 #define PLAT_ARM_CLUSTER_COUNT		U(2)
 #define CSS_SGI_MAX_CPUS_PER_CLUSTER	U(8)