Fixed mfs reboot panic by never returning failure from mfs_start().
Fixed mfs reboot panic by never returning failure from mfs_start().

Obtained from:	4.4BSD-Lite2

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase