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Change-Id: I80a00e1f641b8cc075ca5a95b10607ed9ed8761a
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>

Previously, get_next_bl_params_from_mem_params_desc() populated arg0
in the EL3 runtime entrypoint with a bl_params_t pointer. This is the
responsibility of the generic LOAD_IMAGE_V2 framework instead of the
descriptor-based image loading utility functions. Therefore this patch
moves that code to bl2_load_images().

Also, this patch moves the code that flushes the bl_params structure to
flush_bl_params_desc(), together with the other descriptor-based image
loading flushing code.

Change-Id: I4541e3f50e3878dde7cf89e9e8f31fe0b173fb9d
Signed-off-by: Dan Handley <dan.handley@arm.com>

This patch adds changes in BL1 & BL2 to use new version
of image loading to load the BL images.

Following are the changes in BL1:
  -Use new version of load_auth_image() to load BL2
  -Modified `bl1_init_bl2_mem_layout()` to remove using
   `reserve_mem()` and to calculate `bl2_mem_layout`.
   `bl2_mem_layout` calculation now assumes that BL1 RW
   data is at the top of the bl1_mem_layout, which is more
   restrictive than the previous BL1 behaviour.

Following are the changes in BL2:
  -The `bl2_main.c` is refactored and all the functions
   for loading BLxx images are now moved to `bl2_image_load.c`
   `bl2_main.c` now calls a top level `bl2_load_images()` to
   load all the images that are applicable in BL2.
  -Added new file `bl2_image_load_v2.c` that uses new version
   of image loading to load the BL images in BL2.

All the above changes are conditionally compiled using the
`LOAD_IMAGE_V2` flag.

Change-Id: Ic6dcde5a484495bdc05526d9121c59fa50c1bf23