[PATCH v5 3/4] PCI: layerscape(ep): Rename pf_* as pf_lut_*

[Roy Zang]

> From: Frank Li <frank.li at nxp.com>
> Subject: [PATCH v5 3/4] PCI: layerscape(ep): Rename pf_* as pf_lut_*
> 
> 'pf' and 'lut' is just difference name in difference chips, but basic it is a MMIO
> base address plus an offset.
> 
> Rename it to avoid duplicate pf_* and lut_* in driver.
> 
> Signed-off-by: Frank Li <Frank.Li at nxp.com>
Acked-by:  Roy Zang <Roy.Zang at nxp.com>
Roy