octopus: move common usb/battery code into baseboard Also implement a few remaining usb function for bip BRANCH=none BUG=b:75972988,b:76218141,b:74132235,b:78344554 TEST=verified yorp still functions Change-Id: I201408b5db689ac4a5bcab0011bc38698271b851 Signed-off-by: Jett Rink <jettrink@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/1024279 Reviewed-by: Furquan Shaikh <furquan@chromium.org>