loader: do not print the pci id during normal operation

Spamming the pci id is not beneficial. Make sure it's printed
only when needed.

v2: Change severity to _LOADER_DEBUG, rather than removing
the message.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
1 file changed