dt-bindings: rtc: mpfs-rtc: remove Lewis from maintainers

Lewis hasn't worked at Microchip for a while, and IIRC never actually
worked on the RTC in the first place. Remove him from the maintainers
list in the binding, leaving Daire.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241015-surcharge-caucasian-095d1fd2fa27@wendy


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>