pci_device.c: Don't guard `pci_dev_disable_bus_master()`

The `pci_dev_disable_bus_master()` function doesn't need to be guarded
with `CONFIG(PC80_SYSTEM)`, so move it out of the guard.

Change-Id: I813e0f72c3c624c73ab9ecbe7512359608ace927
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60599
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
diff --git a/src/device/pci_device.c b/src/device/pci_device.c
index 1075ef7..a61fbd6 100644
--- a/src/device/pci_device.c
+++ b/src/device/pci_device.c
@@ -1472,6 +1472,11 @@
 	pci_scan_bus(link, PCI_DEVFN(0, 0), 0xff);
 }
 
+void pci_dev_disable_bus_master(const struct device *dev)
+{
+	pci_update_config16(dev, PCI_COMMAND, ~PCI_COMMAND_MASTER, 0x0);
+}
+
 /**
  * Take an INT_PIN number (0, 1 - 4) and convert
  * it to a string ("NO PIN", "PIN A" - "PIN D")
@@ -1665,9 +1670,4 @@
 		i8259_configure_irq_trigger(irq, IRQ_LEVEL_TRIGGERED);
 	}
 }
-
-void pci_dev_disable_bus_master(const struct device *dev)
-{
-	pci_update_config16(dev, PCI_COMMAND, ~PCI_COMMAND_MASTER, 0x0);
-}
 #endif