dt-bindings: dmaengine: at_xdmac: add compatible with microchip,sama7g5

Add compatible to sama7g5 SoC.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201016081754.288488-1-eugen.hristev@microchip.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>