ARM: dts: msm: expand iommu-map to support PCIe switch on sdxlemur CPE

Additional BDF to SID mappings are needed if a switch and
mutliple endpoints are connected to PCIe root complex. Expand
iommu-map for PCIe on sdxprarie CPE to support such a usecase.

Change-Id: Id7643ab574b1472649bb70121da70a40f31c806c