dt-bindings: hwmon: Add Infineon TDA38640

dt-bindings: hwmon: Add Infineon TDA38640

Add the DT property 'infineon,en-pin-fixed-level' to
indicated that the chip EN pin is at fixed level
or left unconnected(has internal pull-down).

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Naresh Solanki <Naresh.Solanki@9elements.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230831190731.265099-1-Naresh.Solanki@9elements.com
[groeck: Dropped empty line at end]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>