Changed U17 to support the MPU-9250 9 axis accelerometer
Changes TVS1 to use 4.7V_A
Fix I210 ethernet LED polarity
Use 153-ball eMMC to support bigger eMMCs on custom builds
Added PU from 5V_A to SW_5V. This prevents a negative leakage on the the SW_5V rail. If the rail has a negative voltage it will otherwise not switch on.
CPU pin U4 tied to ground. Used to detect REV B boards.
