Add QMK DFU bootloader configuration to planck/dshields keymap. (#3288)

keyboards/planck/keymaps/dshields/config.h

@@ -3,6 +3,11 @@
 
 #include "../../config.h"
 
+#define QMK_ESC_OUTPUT F1
+#define QMK_ESC_INPUT  D5
+#define QMK_LED        E6
+#define QMK_SPEAKER    C6
+
 #define _______ KC_TRNS
 #define XXXXXXX KC_NO
 #define PREVENT_STUCK_MODIFIERS

keyboards/planck/keymaps/dshields/rules.mk

@@ -10,3 +10,4 @@ BACKLIGHT_ENABLE = yes # Enable keyboard backlight functionality
 SLEEP_LED_ENABLE = no  # Breathing sleep LED during USB suspend
 AUDIO_ENABLE     = no
 API_SYSEX_ENABLE = no
+BOOTLOADER       = qmk-dfu