ARM: dts: msm: add pci-ids to PCI OF nodes for sm8150 and sdxprairie

Add device and vendor ID compatbile string to PCI OF node.
PCI framework will match the string to a PCI device and
bound the OF node to it. Add the strings to sm8150 and
sdxprairie.

Change-Id: I9d0a3a01057b04c1f23190e857f2d16ed29b98e7
Signed-off-by: Tony Truong <truong@codeaurora.org>