usb: ehci-ci: Add missing registers.

usb: ehci-ci: Add missing registers.

Some registers of usb_ehci were marked as reserved.
This may be true for some variants of Chipidea USB core, but they have
meaning on other devices.

The following registers were added:
sbusstatus/sbusmode: AHB-related registers
genconfig*: Auxiluary IP core configuration registers.

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Tested-by: Simon Glass <sjg@chromium.org>