device: Add a helper function to add a downstream bus

Adding downstream busses at runtime is a common pattern so add a helper
function.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: Ic898189b92997b93304fcbf47c73e2bb5ec09023
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80210
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

0 files changed, 0 insertions, 0 deletions