USB 2.0 problem on RELENG_6_2 as of yesterday

[Nils A]

My Dell xps-m1210 fails to initialize the ehci driver after
upgrading to RELENG_6_2 (as shown below).
It used to work on 6.1-RELEASE.

ehci0: <Intel 82801GB/R (ICH7) USB 2.0 controller> mem 	
	0xffa80000-0xffa803ff irq 20 at device 29.7 on pci0
ehci0: Could not map memory
device_attach: ehci0 attach returned 6

The full boot -v dmesg output is available here:

http://www.mysharefile.com/v/5230666/62_rc1.txt.html