Boards like Radxa ROCK 5 Model B and NanoPi R5C require PCI to be
initialized in order to discover their onboard network controllers.
During standard boot, PCI gets initialized after faster boot media have
been evaluated. However when an EFI bootflow is run from a fast boot
media, PCI initialization may not have happended and as a result no
network device is exposed to EFI.
Fix this by initializing PCI during EFI bootflow when no ethernet device
can be found.
This allows chainloading e.g. iPXE on ROCK 5B and NanoPi R5C without
having to enable PCI_INIT_R. Enabling of PCI_INIT_R has the side affect
of slowing down booting from faster boot media, by adding ~1 second off
boot delay for each unocupied M.2 slot.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
2bcb3e2762