From: Hanna Linder <hannal@us.ibm.com>

The dev returned from pci_find_device() was not used so it can be
replaced with pci_dev_present().  Compile tested.

Signed-off-by: Hanna Linder <hannal@us.ibm.com>
Signed-off-by: Maximilian Attems <janitor@sternwelten.at>
Signed-off-by: Domen Puncer <domen@coderock.org>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>