bayleybay: Add initial GPIO configuration table.

Configure all GPIOs as default (function 0), except for SMBus / UART
GPIOs.

BUG=chrome-os-partner:22863
TEST=Manual. Using bayleybay GPIO table, set UART GPIOs to 'function 1',
 and verify UART still works after GPIO configuration. Also, verify
legacy GPIO config is functional by toggling test pin.

Change-Id: I429e0b161767af296e7ff69ecbfde2c3a1c2e74a
Reviewed-on: https://chromium-review.googlesource.com/170839
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Shawn Nematbakhsh <shawnn@chromium.org>
Tested-by: Shawn Nematbakhsh <shawnn@chromium.org>
2 files changed