dt-bindings: reset: Add lan966x support

This patch extends the existing file microchip,rst.yaml to support
also the lan966x. For this is added only a new compatible string.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Link: https://lore.kernel.org/r/20211018091522.1113510-2-horatiu.vultur@microchip.com


Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>