hwmon: (lm75) add support for PCT2075

The NXP PCT2075 is largely compatible with other chips already supported
by the LM75 driver. It uses an 11-bit resolution and defaults to 100 ms
sampling period. The datasheet is here:

  https://www.nxp.com/docs/en/data-sheet/PCT2075.pdf



Signed-off-by: Daniel Mack <daniel@zonque.org>
Link: https://lore.kernel.org/r/20190711124504.7580-2-daniel@zonque.org


[groeck: Documentation update]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>