PCI: dwc: rcar-gen4: Mark BAR0 and BAR2 as Resizable BARs in endpoint mode

R-Car Gen4 (S4) endpoint controller implements the PCIe Resizable BAR
capability for BAR0 and BAR2. Advertise them as BAR_RESIZABLE so that EPF
requested BAR sizes are reflected to the host.

Signed-off-by: Koichiro Den <den@valinux.co.jp>
[commit log]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Link: https://patch.msgid.link/20260210160315.2272930-1-den@valinux.co.jp

Author: Koichiro Den

drivers/pci/controller/dwc/pcie-rcar-gen4.c

@@ -422,7 +422,9 @@ static int rcar_gen4_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
 static const struct pci_epc_features rcar_gen4_pcie_epc_features = {
 	DWC_EPC_COMMON_FEATURES,
 	.msi_capable = true,
+	.bar[BAR_0] = { .type = BAR_RESIZABLE, },
 	.bar[BAR_1] = { .type = BAR_RESERVED, },
+	.bar[BAR_2] = { .type = BAR_RESIZABLE, },
 	.bar[BAR_3] = { .type = BAR_RESERVED, },
 	.bar[BAR_4] = { .type = BAR_FIXED, .fixed_size = 256 },
 	.bar[BAR_5] = { .type = BAR_RESERVED, },