usb: increase non-bulk timeout for slow chipsets.

If you take a look at 96820a35, you'll see the original timeout was
CONFIG_SYS_HZ.  Which is 1000.  After the mentioned change, non-bulk timeout
was changed to 100.  This causes timeout failures on the dreamplug platform
when trying to initialize the usb microsd reader.

Signed-off-by: Jason Cooper <u-boot@lakedaemon.net>
Acked-by: Mike Frysinger <vapier@gentoo.org>