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: NHanna Linder <hannal@us.ibm.com>
Signed-off-by: NMaximilian Attems <janitor@sternwelten.at>
Signed-off-by: NDomen Puncer <domen@coderock.org>
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>