CFT: new ath hal (take 2)

A new test snapshot is available at:

http://people.freebsd.org/~sam/ath_hal-20060506.tgz

This is 0.9.17.0 and is known to work on sparc (tested) and may well 
work on alpha (untested but likely the same issue that broke sparc).

This code should be a drop-in replacement for what's in cvs in HEAD but 
be sure to rebuild both the driver and rate control module as there are 
ABI changes.  Note that to use this hal with RELENG_6 or other branches 
other than HEAD you must have rev 1.143 of if_ath.c.  To build a sparc 
module you must have rev 1.5 of modules/ath_hal/Makefile and rev 1.539 
of conf/options.

Please test and report regressions.

	Sam