r8169: fix oops in r8169_get_mac_version

r8169_get_mac_version crashes when it meets an unknown MAC
due to tp->pci_dev not being set. Initialize it early.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
1 file changed