- Add myself in committers-ports.dot

Approved by:	miwi/wxs/wg (mentors)
Export the maxio field in the CAM XPT_PATH_INQ CCB in the isp(4)
driver.

This tells consumers up the stack the maximum I/O size that the
controller can handle.

The I/O size is bounded by the number of scatter/gather segments
the controller can handle and the page size.  For an amd64 system,
it works out to around 5MB.

Reviewed by:	mjacob
MFC after:	3 days
Sponsored by:	Spectra Logic
Call set_i8254_freq with MODE_STOP (0) rather than a magic number of 0.