False positive uipaq probe

[Alexander Motin]

Hi.

USB-connected WM6 communicators are able to operate in two main comm 
modes: serial and RNDIS. That two modes reported with different device 
IDs. I have noticed that my HTC Prophet WM6 communicator started to 
behave wrong on recent CURRENT:

uipaq0: <HTC Generic RNDIS, class 239/1, rev 2.00/0.00, addr 2> on usbus3
device_attach: uipaq0 attach returned 6
uipaq0: <HTC Generic RNDIS, class 239/1, rev 2.00/0.00, addr 2> on usbus3
device_attach: uipaq0 attach returned 6

As soon as uipaq is a kind of serial driver, it should not attach to 
RNDIS device.

-- 
Alexander Motin