[PATCH] Cleanups for hpt27xx(4)

[John Baldwin]

These patches switch hpt27xx(4) from timeout() to callout() and fix it to use 
its existing locks in place of Giant for CAM along with some other cleanups.  
If anyone has any hardware I suspect the ioctl handling is buggy, but I'm more 
hesitant to touch that unless someone has multiple adapters in a single box.
Please be sure to test with INVARIANTS and INVARIANT_SUPPORT enabled.

http://people.FreeBSD.org/~jhb/patches/hpt27xx_locking.patch

-- 
John Baldwin