dt-bindings: hwmon: ti,tmp102: document optional V+ supply property

TMP102 is powered by its V+ supply, document it. The property is called
"vcc-supply" since the plus sign (+) is not a valid property character.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250417180426.3872314-1-peter@korsgaard.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>