Remove concept of top/bottom image loading

This concept is no longer required since we now support loading of
images at fixed addresses only.

The image loader now automatically detects the position of the image
inside the current memory layout and updates the layout such that
memory fragmentation is minimised.

The 'attr' field of the meminfo data structure, which used to hold
the bottom/top loading information, has been removed. Also the 'next'
field has been removed as it wasn't used anywhere.

The 'init_bl2_mem_layout()' function has been moved out of common
code and put in BL1-specific code. It has also been renamed into
'bl1_init_bl2_mem_layout'.

Fixes ARM-software/tf-issues#109

Change-Id: I3f54642ce7b763d5ee3b047ad0ab59eabbcf916d
diff --git a/plat/fvp/bl1_fvp_setup.c b/plat/fvp/bl1_fvp_setup.c
index f758082..82ebed8 100644
--- a/plat/fvp/bl1_fvp_setup.c
+++ b/plat/fvp/bl1_fvp_setup.c
@@ -35,6 +35,7 @@
 #include <mmio.h>
 #include <platform.h>
 #include <platform_def.h>
+#include "../../bl1/bl1_private.h"
 #include "fvp_def.h"
 #include "fvp_private.h"
 
@@ -45,9 +46,6 @@
 extern unsigned long __COHERENT_RAM_START__;
 extern unsigned long __COHERENT_RAM_END__;
 
-extern unsigned long __BL1_RAM_START__;
-extern unsigned long __BL1_RAM_END__;
-
 /*
  * The next 2 constants identify the extents of the coherent memory region.
  * These addresses are used by the MMU setup code and therefore they must be
@@ -58,10 +56,6 @@
 #define BL1_COHERENT_RAM_BASE (unsigned long)(&__COHERENT_RAM_START__)
 #define BL1_COHERENT_RAM_LIMIT (unsigned long)(&__COHERENT_RAM_END__)
 
-#define BL1_RAM_BASE (unsigned long)(&__BL1_RAM_START__)
-#define BL1_RAM_LIMIT (unsigned long)(&__BL1_RAM_END__)
-
-
 /* Data structure which holds the extents of the trusted SRAM for BL1*/
 static meminfo_t bl1_tzram_layout;