hwmon: (lm75) Add explicit default cases in lm75_is_visible()

hwmon: (lm75) Add explicit default cases in lm75_is_visible()

Add explicit default labels to switch statements in lm75_is_visible().

This makes the control flow explicit and improves readability, but also
keeps consistency to other usage of the switch statement in the driver.

Signed-off-by: Flaviu Nistor <flaviu.nistor@gmail.com>
Link: https://lore.kernel.org/r/20260417055700.5739-1-flaviu.nistor@gmail.com
[groeck: Reformatted description for line length]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>