Remove the coherent_ht_car.c file. It is exactly the same as

Remove the coherent_ht_car.c file. It is exactly the same as
coherent_ht.c (save one empty line removed) so there's no use
to keep it around.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Marc Jones <marc.jones@amd.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2998 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1