Add CONFIG_WARNINGS_ARE_ERRORS and set it for qemu.

Remove all remaining warnings from qemu.

Signed-off-by: Myles Watson <mylesgw@gmail.com>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4939 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/devices/device.c

@@ -58,7 +58,9 @@ extern struct device **last_dev_p;
  *
  * @see device_path
  */
-static spinlock_t dev_lock = SPIN_LOCK_UNLOCKED;
+
+DECLARE_SPIN_LOCK(dev_lock)
+
 device_t alloc_dev(struct bus *parent, struct device_path *path)
 {
 	device_t dev, child;