arm64: dts: renesas: beacon: Remove the 'pm-ignore-notify' property

The 'pm-ignore-notify' property is not a valid property and there is
no bindings documentation for it.

Drop such invalid property.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20211208195624.1864654-1-festevam@gmail.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>