Add ATSAME53J18A-AN

Add ATSAME53J18A-AN

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• https://www.microchip.com/wwwproducts/en/ATSAME53J18A
• http://ww1.microchip.com/downloads/en/DeviceDoc/SAM-D5xE5x-Family-Datasheet-01507B.pdf
• Screenshot
• No fooprint PR

• Provide a URL to a datasheet for the symbol(s) you are contributing
• An example screenshot image is very helpful
• Ensure that the associated footprints match the official footprint library
• If there are matching footprint PRs, provide link(s) as appropriate
• Check the output of the Travis automated check scripts - fix any errors as required