msm: pcie: utilize PCI framework hooks to configure PCI devices

Add a hook that PCI framework will call for each PCI
device it discovers during initial scan. Also, use
the PCI framework to configure each PCI device during
PCIe bus driver resume.

Change-Id: Iaa05f3252800c25320c8f30b26330a21db1bf9bb
Signed-off-by: Tony Truong <truong@codeaurora.org>