hwmon: Fix help text for aspeed-g6-pwm-tach

The help text has the wrong module name mentioned, and the capitalisation
of the title is inconsistent.

Fixes: 7e1449cd ("hwmon: (aspeed-g6-pwm-tacho): Support for ASPEED g6 PWM/Fan tach")
Signed-off-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20250110114737.64035-1-joel@jms.id.au


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