RELENG_6 acd0: semaphore timeout

[Jason C. Wells]

I upgraded to 6.0_BETA2 yesterday.  Today I built a new kernel.  While the 
booting, the following error is displayed.

acd0:  SETFEATURES SET TRANSFER MODE semaphore timout !! DANGER Will 
Robinson !!

I recompiled the kernel without atapicd and the kernel boots fine.  At some 
later time, that kernel panics.  I will write that up in another message.

Later,
Jason C. Wells