Simplify entry point information generation code on FVP

This patch reworks FVP specific code responsible for determining
the entry point information for BL3-2 and BL3-3 stages when BL3-1
is configured as the reset handler.

Change-Id: Ia661ff0a6a44c7aabb0b6c1684b2e8d3642d11ec
diff --git a/bl31/aarch64/bl31_entrypoint.S b/bl31/aarch64/bl31_entrypoint.S
index 3c9042b..6b3ae6a 100644
--- a/bl31/aarch64/bl31_entrypoint.S
+++ b/bl31/aarch64/bl31_entrypoint.S
@@ -102,6 +102,10 @@
 	msr	cptr_el3, x1
 
 #if RESET_TO_BL31
+	/* -------------------------------------------------------
+	 * Will not return from this macro if it is a warm boot.
+	 * -------------------------------------------------------
+	 */
 	wait_for_entrypoint
 	bl	platform_mem_init
 #else