db845c: BoardConfig: Correct the super partition size am: 7d3a1ac4e5 am: 5c6916bb54 am: 345164f628 am: ba4feda6ce

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/1452362

Change-Id: I0d561814dae6f9bf06ce0c56af6b4b77aff98a34