[Keyboard] Fix compiled size for Kudox Full keyboard (#15809)

keyboards/kudox_full/rules.mk

@@ -7,17 +7,17 @@ BOOTLOADER = caterina
 # Build Options
 #   change yes to no to disable
 #
-BOOTMAGIC_ENABLE = no       # Enable Bootmagic Lite
+BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
 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
-# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 NKRO_ENABLE = no            # Enable N-Key Rollover
 BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
 RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
 AUDIO_ENABLE = no           # Audio output
 UNICODE_ENABLE = yes        # Unicode
+LTO_ENABLE = yes
 
 SPLIT_KEYBOARD = yes