qemu/x86: car: drop pointless code, move stack out of the way

RAM doesn't need any initialization on qemu, so we can simply use it
right away.  No need to try using the cache as ram in the first place.

We also can place the stack in normal ram right from start and we
don't have to switch it to another place later on.  Place the stack
in real mode memory which isn't used for something else.

Change-Id: Ib7a3f58a846d139f7babea5f43722a30fe0fe962
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-on: https://review.coreboot.org/15214
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
1 file changed