hwmon: (aspeed-pwm-tacho) Add dependency on ARCH_ASPEED

The SENSORS_ASPEED is part of the Aspeed silicon so it makes
sense to depend on ARCH_ASPEED and for compile testing.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Link: https://lore.kernel.org/r/20220916120936.372591-1-pbrobinson@gmail.com


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