cr50: Align the CCD interfaces to match the traditional servos

The change moves interfaces:
 #1 -> #7 for EC console
 #3 -> #8 for CPU console
 #8 -> #9 for Cr50 console (EC3PO), shared with USBPD

BUG=b:37473185
TEST=Tested on servo v4 with CCD, started servod and checked the
EC/CPU/Cr50 consoles.

Change-Id: I55ef8f1b61230e60d777fa4c388ffb5a7463d5d0
Reviewed-on: https://chromium-review.googlesource.com/489610
Commit-Ready: Wai-Hong Tam <waihong@google.com>
Tested-by: Wai-Hong Tam <waihong@google.com>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
3 files changed