support older atmega1280, as per discord chat

Richard Unger · Richard Unger · commit db0ed82982c1 · 2023-01-01T19:07:58.000+01:00
diff --git a/src/drivers/hardware_specific/atmega/atmega2560_mcu.cpp b/src/drivers/hardware_specific/atmega/atmega2560_mcu.cpp
@@ -1,6 +1,6 @@
 #include "../../hardware_api.h"
 
-#if defined(__AVR_ATmega2560__)
+#if defined(__AVR_ATmega2560__) || defined(AVR_ATmega1280)
 
 #define _PWM_FREQUENCY 32000
 #define _PWM_FREQUENCY_MAX 32000
