dt-bindings: interrupt-controller: microchip,sama7g5-eic: use proper naming syntax

Use the following syntax for Microchip EIC YAML file: vendor,device.yaml.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230523070637.224476-2-claudiu.beznea@microchip.com


Signed-off-by: Rob Herring <robh@kernel.org>