ARM: configs: at91: sama5: update with savedefconfig

While enabling an extra config, I've noticed that savedefconfig produced
a notable delta. Split out the no-op changes for clarity sake.

Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210311154055.3496076-10-emil.l.velikov@gmail.com