Use ffs() to locate free bits in the inode bitmap rather than a loop with bit shifts.
Use ffs() to locate free bits in the inode bitmap rather than a loop with
bit shifts.

Reviewed by:	mckusick
MFC after:	1 month

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