PCI: mvebu: Remove redundant of_match_ptr

mvebu_pcie_of_match_table is always compiled in.  Hence of_match_ptr is not
required.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>