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/20211204220316.88655-1-rikard.falkeborn@gmail.comSigned-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>

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

@@ -619,7 +619,7 @@ static void qcom_pcie_ep_init(struct dw_pcie_ep *ep)
 		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,