[Core] Cleanup rules.mk for F303 keyboards (#7306)

* Cleanup rules.mk for F303 keyboards

* Fix small typo

keyboards/1upkeyboards/sweet16/v1/rules.mk

@@ -1,5 +1,17 @@
+# MCU name
 MCU = atmega32u4
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
 BOOTLOADER = caterina
-LINK_TIME_OPTIMIZATION_ENABLE=yes
+
 RGBLIGHT_ENABLE = yes
-BACKLIGHT_ENABLE = no  # Enable keyboard backlight functionality
+BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
+
+LINK_TIME_OPTIMIZATION_ENABLE = yes

keyboards/1upkeyboards/sweet16/v2/promicro/rules.mk

@@ -1,6 +1,15 @@
+# MCU name
 MCU = atmega32u4
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
 BOOTLOADER = caterina
-LINK_TIME_OPTIMIZATION_ENABLE=yes
 
 ## Features
 CONSOLE_ENABLE = yes
@@ -8,3 +17,5 @@ CONSOLE_ENABLE = yes
 ## On a Pro Micro you have to choose between underglow and the rotary encoder.
 RGBLIGHT_ENABLE = no
 ENCODER_ENABLE = yes
+
+LINK_TIME_OPTIMIZATION_ENABLE = yes

keyboards/1upkeyboards/sweet16/v2/proton_c/rules.mk

@@ -1,3 +1,4 @@
+# MCU name
 MCU = STM32F303
 
 ## Features