ARM: at91: Documentation: update the sama5d3 and armv7m datasheets

Update SAMA5D3 and SAM E70/S70/V70/V71 Family SoC Datasheets. URL are
updated in Microchip documentation.

Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20190819151219.19727-1-nicolas.ferre@microchip.com


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>