Dactyl Manuform cleanup (#13686)

keyboards/handwired/dactyl_manuform/5x6_2_5/rules.mk

@@ -1,14 +1,23 @@
-BOOTMAGIC_ENABLE = lite
-COMMAND_ENABLE = no
+# MCU name
+MCU = atmega32u4
 
-# # Pro-Micro
-# NKRO_ENABLE = yes
+# Bootloader selection
+BOOTLOADER = caterina
 
-# # # Adafruit Feather
-# # NKRO_ENABLE = no
-# # # Processor frequency
-# F_CPU = 8000000
-# F_USB = $(F_CPU)
-# # # BLUETOOTH_ENABLE = no
-# # BLUETOOTH = AdafruitBLE
-# # CONSOLE_DEBUG = yes
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+SPLIT_KEYBOARD = yes