hwmon: (ntc_thermistor) Underscore Samsung thermistor

The sysfs does not like that we name the thermistor something
that contains a dash:

ntc-thermistor thermistor: hwmon: 'ssg1404-001221' is not a valid
name attribute, please fix

Fix it up by switching to an underscore.

Fixes: e13e979 ("hwmon: (ntc_thermistor) Add Samsung 1404-001221 NTC")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220205005804.123245-1-linus.walleij@linaro.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/ntc_thermistor.c

@@ -59,7 +59,7 @@ static const struct platform_device_id ntc_thermistor_id[] = {
  [NTC_NCP15XH103] = { "ncp15xh103", TYPE_NCPXXXH103 },
  [NTC_NCP18WB473] = { "ncp18wb473", TYPE_NCPXXWB473 },
  [NTC_NCP21WB473] = { "ncp21wb473", TYPE_NCPXXWB473 },
- [NTC_SSG1404001221] = { "ssg1404-001221", TYPE_NCPXXWB473 },
+ [NTC_SSG1404001221] = { "ssg1404_001221", TYPE_NCPXXWB473 },
  [NTC_LAST] = { },
 };