Add missing `BOOTLOADER` for a handful of boards (#16225)

keyboards/ez_maker/directpins/teensy_32/info.json

@@ -4,6 +4,7 @@
     "maintainer": "skullydazed",
     "debounce": 5,
     "processor": "MK20DX256",
+    "bootloader": "halfkay",
     "features": {
         "bootmagic": true,
         "extrakey": true,

keyboards/ez_maker/directpins/teensy_lc/info.json

@@ -4,6 +4,7 @@
     "maintainer": "skullydazed",
     "debounce": 5,
     "processor": "MKL26Z64",
+    "bootloader": "halfkay",
     "features": {
         "bootmagic": true,
         "extrakey": true,

keyboards/handwired/twadlee/tp69/rules.mk

@@ -1,6 +1,9 @@
 # MCU name
 MCU = MKL26Z64
 
+# Bootloader selection
+BOOTLOADER = halfkay
+
 # Build Options
 #   change yes to no to disable
 #

keyboards/keychron/q2/rev_0110/rules.mk

@@ -1,6 +1,9 @@
 # MCU name
 MCU = STM32L433
 
+# Bootloader selection
+BOOTLOADER = stm32-dfu
+
 # Build Options
 #   change yes to no to disable
 #

keyboards/keychron/q2/rev_0111/rules.mk

@@ -1,6 +1,9 @@
 # MCU name
 MCU = STM32L433
 
+# Bootloader selection
+BOOTLOADER = stm32-dfu
+
 # Build Options
 #   change yes to no to disable
 #

keyboards/keychron/q2/rev_0112/rules.mk

@@ -1,6 +1,9 @@
 # MCU name
 MCU = STM32L433
 
+# Bootloader selection
+BOOTLOADER = stm32-dfu
+
 # Build Options
 #   change yes to no to disable
 #

keyboards/keychron/q2/rev_0113/rules.mk

@@ -1,6 +1,9 @@
 # MCU name
 MCU = STM32L433
 
+# Bootloader selection
+BOOTLOADER = stm32-dfu
+
 # Build Options
 #   change yes to no to disable
 #