Since Linux commit fb51ccbf217 (PCI: Rework config space blocking services),
the functions pci_(un)block_user_cfg_access are replaced by
pci_cfg_access_(un)lock.
The compatibility with older functions was broken since commit 399a3f0db8b0
(igb_uio: fix IRQ mode handling).
Reported-by: Yerden Zhumabekov <e_zhumabekov@sts.kz>
Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>