usb/77604 and usb/85972: fix for logitech (and others) cordless mouse

[Sam Lawrance]

Could someone look at these PRs?  usb/85972 contains an unmangled patch.

The patch has been tested by myself and four others with similar issues.

The patch was obtained from NetBSD hid.c [1], and adapted to include
obrien's last commit to uhid.c [2].

1. http://fxr.watson.org/fxr/source/dev/usb/hid.c?v=NETBSD#L379
2. http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/usb/hid.c? 
f=h#rev1.25

Cheers
Sam