PCI: qcom-ep: Constify static dw_pcie_ep_ops

The only usage of pci_ep_ops is to assign its address to the ops field
in the dw_pcie_ep struct which is a pointer to const struct dw_pcie_ep_ops.
Make it const to allow the compiler to put it in read-only memory.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rikard Falkeborn <[e-mail]>
Signed-off-by: Lorenzo Pieralisi <[e-mail]>
Reviewed-by: Krzysztof Wilczyński <[e-mail]>

drivers/pci/controller/dwc/pcie-qcom-ep.c

···
 		dw_pcie_ep_reset_bar(pci, bar);
 }
 
-static struct dw_pcie_ep_ops pci_ep_ops = {
+static const struct dw_pcie_ep_ops pci_ep_ops = {
 	.ep_init = qcom_pcie_ep_init,
 	.raise_irq = qcom_pcie_ep_raise_irq,
 	.get_features = qcom_pcie_epc_get_features,