Clean up decorations and whitespace around header guards

Cleaned up with scripts/clean-header-guards.pl.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
diff --git a/include/qemu/host-utils.h b/include/qemu/host-utils.h
index 3de7d4e..46187bb 100644
--- a/include/qemu/host-utils.h
+++ b/include/qemu/host-utils.h
@@ -22,8 +22,9 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+
 #ifndef HOST_UTILS_H
-#define HOST_UTILS_H 1
+#define HOST_UTILS_H
 
 #include "qemu/bswap.h"