Refactor cannonkeys f103 boards to use core backlight (#8089)

* Refactor to use core backlight

* Remove custom implementation

keyboards/cannonkeys/practice65/config.h

@@ -33,6 +33,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { B4, B11, B1, B7, B6 }
 #define DIODE_DIRECTION COL2ROW
 
+#define BACKLIGHT_PIN A8
+#define BACKLIGHT_PWM_DRIVER PWMD1
+#define BACKLIGHT_PWM_CHANNEL 1
 #define BACKLIGHT_LEVELS 6
 #define BACKLIGHT_BREATHING
 #define BREATHING_PERIOD 6

keyboards/cannonkeys/practice65/rules.mk

@@ -11,8 +11,7 @@ DFU_SUFFIX_ARGS = -v 1eaf -p 0003
 
 # project specific files
 VPATH += keyboards/cannonkeys/bluepill
-SRC =	led.c \
-      keyboard.c
+SRC =	keyboard.c
 
 #BOOTMAGIC_ENABLE = yes	# Virtual DIP switch configuration
 MOUSEKEY_ENABLE = yes	# Mouse keys
@@ -20,9 +19,8 @@ EXTRAKEY_ENABLE = yes	# Audio control and System control
 CONSOLE_ENABLE = yes	# Console for debug
 COMMAND_ENABLE = yes    # Commands for debug and configuration
 SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
-NKRO_ENABLE = yes	    # USB Nkey Rollover
+NKRO_ENABLE = yes	      # USB Nkey Rollover
 BACKLIGHT_ENABLE = yes
-BACKLIGHT_DRIVER = custom
 RGBLIGHT_ENABLE = yes