PCI: mvebu: Return zero for reserved or unimplemented config space

PCI requires reads to reserved or unimplemented configuration space to
return zero and complete normally (see PCI r3.0, sec 6.1).  However, the
root port software implementation was returning 0xfffffff and
PCIBIOS_BAD_REGISTER_NUMBER.

Return zero when reading reserved or unimplemented config space.

[bhelgaas: changelog]
Tested-by: Thomas Petazzoni <[email protected]> (Armada XP GP)
Tested-by: Andrew Lunn <[email protected]> (Kirkwood DIR665)
Signed-off-by: Russell King <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Thomas Petazzoni <[email protected]>

0 files changed, 0 insertions, 0 deletions