tools/virtio: add struct cpumask to cpumask.h

Add struct cpumask stub used by virtio_config.h.

Created using Cursor CLI.

Message-ID: <[e-mail]>
Acked-by: Jason Wang <[e-mail]>
Signed-off-by: Michael S. Tsirkin <[e-mail]>

tools/virtio/linux/cpumask.h

···
 
 #include <linux/kernel.h>
 
+struct cpumask {
+	unsigned long bits[1];
+};
+
 #endif /* _LINUX_CPUMASK_H */