dt-bindings: serial: cdns,uart: Add optional reset property

Add optional reset device-tree property to the uartps controller.

Signed-off-by: Manikanta Guntupalli <manikanta.guntupalli@amd.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240425062358.1347684-2-manikanta.guntupalli@amd.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>