Change memory layout to leave 188M heap space.

We're working on some changes (code signing checks, etc) that might want
more RAM to implement in a naive way.  We have lots, so let's move
things up higher so we can still unpack the kernel in low memory.

According to this document

"86xxx-SWG-001-A"
"M86xxx Comcerto 2000 Family
Linux Board Support Package (BSP)
Architecture Specification"

the space from 0x0440_0000 to 0x0fff_ffff is unused.

To verify this change, I filled up the malloc area with files I tftp'd
onto the target. Even after it stopped with "write: Out of memory", the
network (PFE) still worked and I was still able to boot Linux.

Change-Id: I1ee7706848628fec86f7888653712d4d4a136ff6
1 file changed