include/device/device_util.c: add predicates for pci devices

add functions to check whether a device is enabled pci
device or a pci device on a specific bus number.

TEST: compile and qemu run successfully

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Change-Id: I3257c8404017372f6cdd9f6cf9453502447343a0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68101
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/device/device_util.c

@@ -965,3 +965,18 @@ bool is_enabled_cpu(const struct device *cpu)
 {
 	return is_cpu(cpu) && cpu->enabled;
 }
+
+bool is_pci(const struct device *pci)
+{
+	return pci->path.type == DEVICE_PATH_PCI;
+}
+
+bool is_enabled_pci(const struct device *pci)
+{
+	return is_pci(pci) && pci->enabled;
+}
+
+bool is_pci_dev_on_bus(const struct device *pci, unsigned int bus)
+{
+	return is_pci(pci) && pci->bus->secondary == bus;
+}

src/include/device/device.h

@@ -209,6 +209,9 @@ bool is_dev_enabled(const struct device *const dev);
 bool is_devfn_enabled(unsigned int devfn);
 bool is_cpu(const struct device *cpu);
 bool is_enabled_cpu(const struct device *cpu);
+bool is_pci(const struct device *pci);
+bool is_enabled_pci(const struct device *pci);
+bool is_pci_dev_on_bus(const struct device *pci, unsigned int bus);
 
 /* Returns whether there is a hotplug port on the path to the given device. */
 extern bool dev_path_hotplug(const struct device *);