pci: layerscape: Fix the disabling of Expansion ROM BAR

The software will still get non-zero Expansion ROM BAR size
even when the BAR_EN bit is cleared. The BAR_EN bit of
register EXP_ROM_BAR_MASK_RC is not working as expected,
so this patch changes to mask all the bits.

Fixes: 80afc63fc342 ("pci: layerscape: add pci driver based on DM")
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
1 file changed