dt-bindings: power: supply: document Samsung S2MU005 battery fuel gauge

dt-bindings: power: supply: document Samsung S2MU005 battery fuel gauge

Samsung S2MU005 is a PMIC device which has LED controllers, an MUIC and
a battery charger. The battery charger is paired with an independent
device connected via I2C which can be used to access various metrics of
the battery. Document the device as a schema.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
Link: https://patch.msgid.link/20260304-s2mu005-fuelgauge-v3-1-e4dc4e47cde8@disroot.org
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>