ARM: configs: at91: sama5: enable the Hantro G1 engine

The SoC features a Hantro G1 compatible engine. Enable it by default, so
people can make use of it.

Keep it a module, as suggested by Nicolas

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/20210311154055.3496076-11-emil.l.velikov@gmail.com