Enable bootmagic lite for CU80 (#8363)

keyboards/cu80/rules.mk

@@ -14,7 +14,7 @@ BOOTLOADER = atmel-dfu
 # Build Options
 #   change yes to no to disable
 #
-BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
 MOUSEKEY_ENABLE = no        # Mouse keys
 EXTRAKEY_ENABLE = yes       # Audio control and System control
 CONSOLE_ENABLE = no         # Console for debug