Assume kernel has devtmpfs enabled --> cleanup device creation & mount

Cleanup device creation and initial mount by assuming that the kernel
has devtmpfs enabled.  This is the default for most modern GNU/Linux
distributions.  See http://lwn.net/Articles/331818/ for more info.

Also, since finit is targeted at deeply embedded systems hooks for the
BusyBox udev replacement, mdev has been added.  If MDEV is defined in
the build it will take care of both hotplugging of devices and initial
setup of /dev

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

initctl.c

@@ -22,7 +22,6 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */
 
-#ifdef LISTEN_INITCTL
 #include <features.h>
 #include <fcntl.h>
 #include <signal.h>
@@ -45,6 +44,7 @@ struct init_request {
 	char	data[368];
 };
 
+#ifdef LISTEN_INITCTL
 /* Standard reboot/shutdown utilities talk to init using /dev/initctl.
  * We should check if the fifo was recreated and reopen it.
  */