Use the correct device.  Note this commit complements r274386.

PR:		194884
Move NFS and TFTP filesystems before the synthetic filesystems (bzip,
gzip, and split).  "Real" filesystems should always be listed first so
that the "bare" filename is tried before alternate filenames.  For PXE
booting in particular this can remove a lot of spurious pathname lookups.

While here, move splitfs to the bottom after the bzip and gzip filesystems
as it is the least often used.

Tested by:	Prokash Sinha <psinha@panasas.com>
MFC after:	1 week
Fix whitespace.

Thanks to:	nwhitehorn
Add device ID for the T502-BT (dual-port 1G) adapter.

Reviewed by:	np
MFC after:	1 week