dt-bindings: net: dsa: microchip: add microchip,pme-active-high flag

dt-bindings: net: dsa: microchip: add microchip,pme-active-high flag

Add microchip,pme-active-high property to set the PME (Power
Management Event) pin polarity for Wake on Lan interrupts.

Note that the polarity is active-low by default.

Signed-off-by: Pieter Van Trappen <pieter.van.trappen@cern.ch>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://patch.msgid.link/20240813142750.772781-2-vtpieter@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>