include/device/path.h: use functions for enabled cpu selection

Add function defs and prototypes of functions checking whether
a device is {a cpu,an enabled cpu}

TEST: compile test and qemu executed successfully with
coreinfo payload

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Change-Id: Iabc0e59d604ae4572921518a8dad47dc3d149f81
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67502
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/device/device_util.c

@@ -957,3 +957,14 @@ void log_resource(const char *type, const struct device *dev, const struct resou
 			  srcfile, line, type, dev_path(dev), res->index, res->base,
 			  resource_end(res), res->size / KiB);
 }
+
+bool is_cpu(const struct device *cpu)
+{
+	return cpu->path.type == DEVICE_PATH_APIC &&
+	       cpu->bus->dev->path.type == DEVICE_PATH_CPU_CLUSTER;
+}
+
+bool is_enabled_cpu(const struct device *cpu)
+{
+	return is_cpu(cpu) && cpu->enabled;
+}