intel: Platform common code refactor

Pull out common code from aarch64 and include

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: I4d0f5e1bb01bcdacbedf8e6c359de594239b645f
diff --git a/plat/intel/soc/agilex/include/platform_def.h b/plat/intel/soc/agilex/include/platform_def.h
index 10f7338..277862a 100644
--- a/plat/intel/soc/agilex/include/platform_def.h
+++ b/plat/intel/soc/agilex/include/platform_def.h
@@ -15,7 +15,7 @@
 
 
 #define PLAT_CPUID_RELEASE			0xffe1b000
-#define PLAT_AGX_SEC_ENTRY			0xffe1b008
+#define PLAT_SEC_ENTRY				0xffe1b008
 
 /* Define next boot image name and offset */
 #define PLAT_NS_IMAGE_OFFSET			0x50000