device: move is_domain0 and is_dev_on_domain0 to common code

Move is_domain0 and is_dev_on_domain0 from the Intel Xeon SP code to the
common coreboot code so that it can be used elsewhere in coreboot too,
and while moving also implement it as functions instead of macros which
is more in line with the rest of helper functions in that new file.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I954251ebc82802c77bf897dfa2db54aa10bc5ac4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83642
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Shuo Liu <shuo.liu@intel.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/device/device.h

@@ -194,6 +194,8 @@ 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);
 bool is_pci_bridge(const struct device *pci);
+bool is_domain0(const struct device *dev);
+bool is_dev_on_domain0(const struct device *dev);
 
 /* Returns whether there is a hotplug port on the path to the given device. */
 bool dev_path_hotplug(const struct device *);