pci: layerscape: fix a dead loop issue

Fixes: commit 8ec619f8 ("pci: layerscape: Fixup PCIe EP
	mode DT nodes for LX2160A rev2")

This added the PCIe EP nodes fixup of LX2160A, but it
didn't update the condition value when there isn't a
property 'apio-wins'.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[Fixed checkpatch error]
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>