dt-bindings: arm: msm: add support for BDF filtering

Add DT entry to filter out list of BDFs for enumeration. This
list is required for PCIe switches unable to respond to
configuration access request to certain supported BDFs.
Without filtering, such BDFs are causing system bus hang or
enumeration failure of downstream ports of switch.

Change-Id: Ic89ad56f290f91f1e50255a4fdaa2f7d0d78b539