[Keyboard] Reduce compile size for takashicompany compacx (#15054)

keyboards/takashicompany/compacx/keymaps/via/rules.mk

@@ -1 +1 @@
-VIA_ENABLE = yes
+VIA_ENABLE = yes

keyboards/takashicompany/compacx/rules.mk

@@ -21,3 +21,4 @@ RGBLIGHT_ENABLE = yes        # Enable keyboard RGB underglow
 AUDIO_ENABLE = no           # Audio output
 SPLIT_KEYBOARD=yes
 ENCODER_ENABLE = yes
+LTO_ENABLE = yes