PCI: qcom-ep: Make use of the cached dev pointer

In the qcom_pcie_ep_get_resources() function, dev pointer is already
cached in a local variable. So let's make use of it instead of getting
the dev pointer again from pdev struct.

Link: https://lore.kernel.org/r/20220914075350.7992-4-manivannan.sadhasivam@linaro.org


Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>