While 64-bit writes seem to work properly, there could be unknown
side-effects in some cases, e.g. when running in long mode. Since
reference code uses two 32-bit writes, follow suit.
Change-Id: I48ed3d94c7865b3a3cce52108e99cf1656b57fc2
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51855
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>