device/pciexp_device.c: Remove CPP guarding

Let the linker do its job.
This fixes building with !CONFIG_PCIEXP_HOTPLUG on some platforms.

Change-Id: I46560722dcb5f1d902709e40b714ef092515b164
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51417
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/src/device/pci_device.c b/src/device/pci_device.c
index 161715f..d18b2f1 100644
--- a/src/device/pci_device.c
+++ b/src/device/pci_device.c
@@ -882,14 +882,15 @@
 		case PCI_EXP_TYPE_DOWNSTREAM:
 			printk(BIOS_DEBUG, "%s subordinate bus PCI Express\n",
 			       dev_path(dev));
-#if CONFIG(PCIEXP_HOTPLUG)
-			u16 sltcap;
-			sltcap = pci_read_config16(dev, pciexpos + PCI_EXP_SLTCAP);
-			if (sltcap & PCI_EXP_SLTCAP_HPC) {
-				printk(BIOS_DEBUG, "%s hot-plug capable\n", dev_path(dev));
-				return &default_pciexp_hotplug_ops_bus;
+			if (CONFIG(PCIEXP_HOTPLUG)) {
+				u16 sltcap;
+				sltcap = pci_read_config16(dev, pciexpos + PCI_EXP_SLTCAP);
+				if (sltcap & PCI_EXP_SLTCAP_HPC) {
+					printk(BIOS_DEBUG, "%s hot-plug capable\n",
+					       dev_path(dev));
+					return &default_pciexp_hotplug_ops_bus;
+				}
 			}
-#endif /* CONFIG(PCIEXP_HOTPLUG) */
 			return &default_pciexp_ops_bus;
 		case PCI_EXP_TYPE_PCI_BRIDGE:
 			printk(BIOS_DEBUG, "%s subordinate PCI\n",