[Keyboard] VIA fix firmware sizes (#11770)

keyboards/mechlovin/delphine/keymaps/via/rules.mk

@@ -1 +1,2 @@
-VIA_ENABLE = yes
+VIA_ENABLE = yes
+LTO_ENABLE = yes

keyboards/nightly_boards/n40_o/keymaps/via/config.h

@@ -0,0 +1 @@
+#define LAYER_STATE_8BIT 

keyboards/xelus/valor/rev1/rules.mk

@@ -10,8 +10,8 @@ BOOTLOADER = atmel-dfu
 BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
 MOUSEKEY_ENABLE = yes       # Mouse keys
 EXTRAKEY_ENABLE = yes       # Audio control and System control
-CONSOLE_ENABLE = yes        # Console for debug
-COMMAND_ENABLE = yes        # Commands for debug and configuration
+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