Board-pyramid: huge memory map rehaul for the higher memory map

Userspace has 624MB of RAM again and all reboots related to the higher memory map should now be fixed.

Signed-off-by: Sultanxda <sultanxda@gmail.com>
GPU: remove a3xx parts

Thank you, mrg666

Signed-off-by: Sultanxda <sultanxda@gmail.com>