After r241616 properly export ifi_baudrate_pf in the 32bit compat case.

MFC after:	3 days
Catch up with various changes to if_data and make this compile again
on HEAD.  Seems to be one of the the only tools giving us access to
ifi_baudrate and ifi_baudrate_pf values.

MFC after:	3 days
Correct a typo in the event mask mnemonic.

Reviewed by:	gnn
MFC after:	3 days