remove unused #include, add $FreeBSD$

sys/dev/en/midway.c

@@ -31,6 +31,8 @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
  */
 
 /*
@@ -126,7 +128,6 @@
 #include <sys/device.h>
 #endif
 #include <sys/sockio.h>
-#include <sys/malloc.h>
 #include <sys/mbuf.h>
 #include <sys/socket.h>
 #include <sys/proc.h>