Split makefile settings between thermostat, master, and RFM specific.

Signed-off-by: Tomas Kopal <Tomas.Kopal@altap.cz>
Fixed LCD framerate for HR25, as the duty cycle is different than in HR20 (due to COM3).

Signed-off-by: Tomas Kopal <Tomas.Kopal@altap.cz>