Practice60 RGB and PWM Backlight (#4929)

* Update Practice60 to enable RGB via SPI DMA and use PWM backlight breathing

* Correct stm32f103c8t6 flash size in eeprom definition

* Remove unused files and improve ifdef checks

* Update quantum/rgblight.c

Co-Authored-By: awkannan <[email protected]>

* Update quantum/rgblight.c

Co-Authored-By: awkannan <[email protected]>

* EEPROM implementation fix and updated p60 code

* Update define

* Remove dead code

* Update keymap to remove test key

* Update keymap again

drivers/avr/ws2812.c

@@ -128,11 +128,11 @@ unsigned char I2C_Write(unsigned char c)
         c <<= 1;
     }
 
-    
+
     I2C_WriteBit(0);
     _delay_us(I2C_DELAY);
     _delay_us(I2C_DELAY);
-  
+
     // _delay_us(I2C_DELAY);
     //return I2C_ReadBit();
     return 0;