ARM: dts: msm: add pci-ids string for qca6390 device

Add device id and vendor id as pci-ids string for qca6390
device under pcie0_rp device node.

Change-Id: I9bfdd359011d88ac335d889f58a1f0ad14e2ecd8
Signed-off-by: Jia Ding <jiad@codeaurora.org>