hwmon: (emc2305) add support for EMC2301/2/3/5 RPM-based PWM Fan Speed Controller.

Submitted to linux-hwmon mailing list at
https://patchwork.kernel.org/project/linux-hwmon/patch/20220430114905.53448-2-michaelsh@nvidia.com/



Add driver for Microchip EMC2301/2/3/5 RPM-based PWM Fan Speed Controller.
Modify Makefile and Kconfig to support Microchip EMC2305 RPM-based
PWM Fan Speed Controller.

Signed-off-by: Michael Shych <michaelsh@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>