pci: Disable autoconfig in SPL

At present U-Boot runs autoconfig in SPL but this is best left to U-Boot
proper. For TPL and SPL we can normally used fixed BARs and save code size
and time.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

drivers/pci/pci-uclass.c

@@ -983,7 +983,7 @@ static int pci_uclass_post_probe(struct udevice *bus)
 	if (ret)
 		return ret;
 
-#ifdef CONFIG_PCI_PNP
+#if CONFIG_IS_ENABLED(PCI_PNP)
 	ret = pci_auto_config_devices(bus);
 	if (ret < 0)
 		return ret;