PCI: qcom: Fix pp->dev usage before assignment

Initialize pp->dev in qcom_pcie_probe() before calling get_resources(),
which uses it.

[bhelgaas: changelog]
Fixes: e6a087ee

 ("PCI: qcom: Remove redundant struct qcom_pcie.dev")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>