ARM: dts: wpcm450-supermicro-x9sci-ln4f: Add GPIO LEDs and buttons

The Supermicro X9SCi-LN4F server mainboard has a two LEDs and a button
under the control of the BMC. This patch makes them accessible under
Linux running on the BMC.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20220129115228.2257310-9-j.neuschaefer@gmx.net


Signed-off-by: Joel Stanley <joel@jms.id.au>