Add support for the OpenMote-CC2538 Rev.A1 board that uses the CC2538SF23 (256 KB) chip instead of the CC2538SF53 (512 KB) chip.
Add support for the OpenMote-CC2538 Rev.A1 board that uses the CC2538SF23 (256 KB) chip instead of the CC2538SF53 (512 KB) chip.

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