refactor(boards): Move BDN9 to HWMv2

Move BDN9 to HWMv2, using the base `bdn9` ID, no longer including the
`_rev2` suffix in the ID.

app/boards/arm/bdn9/Kconfig.board

@@ -1,8 +0,0 @@
-# keeb.io BDN9 board configuration
-
-# Copyright (c) 2020 The ZMK Contributors
-# SPDX-License-Identifier: MIT
-
-config BOARD_BDN9
-    bool "BDN9 rev2"
-    depends on SOC_STM32F072XB

app/boards/arm/bdn9/bdn9_rev2.yml

@@ -1,11 +0,0 @@
-file_format: "1"
-id: bdn9_rev2
-name: BDN9 Rev2
-type: board
-arch: arm
-features:
-  - keys
-  - encoder
-outputs:
-  - usb
-url: https://keeb.io/products/bdn9-rev-2-3x3-9-key-macropad-rotary-encoder-and-rgb

app/boards/keebio/bdn9/Kconfig.bdn9

@@ -0,0 +1,5 @@
+# Copyright (c) 2020 Pete Johanson
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_BDN9
+    select SOC_STM32F072XB

app/boards/keebio/bdn9/bdn9.dts

@@ -11,7 +11,7 @@
 
 #include <dt-bindings/zmk/matrix_transform.h>
 
-#include "bdn9_rev2-layouts.dtsi"
+#include "bdn9-layouts.dtsi"
 
 &physical_layout0 {
     transform = <&matrix_transform0>;

app/boards/keebio/bdn9/bdn9.zmk.yml

@@ -1,6 +1,6 @@
 file_format: "1"
-id: bdn9_rev2
+id: bdn9
-name: BDN9 Rev2
+name: BDN9 (Rev2)
 type: board
 arch: arm
 outputs:
@@ -9,3 +9,6 @@ features:
   - keys
   - encoder
 url: https://keeb.io/collections/bdn9-collection/products/bdn9-rev-2-3x3-9-key-macropad-rotary-encoder-and-rgb
+revisions:
+  - "2.0.0"
+default_revision: "2.0.0"

app/boards/keebio/bdn9/bdn9_defconfig

@@ -1,7 +1,5 @@
 # SPDX-License-Identifier: MIT
 
-CONFIG_SOC_SERIES_STM32F0X=y
-CONFIG_SOC_STM32F072XB=y
 # 72MHz system clock
 CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=72000000
 

app/boards/keebio/bdn9/board.yml

@@ -0,0 +1,10 @@
+board:
+  name: bdn9
+  vendor: keebio
+  socs:
+    - name: stm32f072xb
+  revision:
+    format: major.minor.patch
+    default: 2.0.0
+    revisions:
+      - name: 2.0.0

app/core-coverage.yml

@@ -9,7 +9,7 @@ shield:
   - settings_reset
   - tidbit
 include:
-  - board: bdn9_rev2
+  - board: bdn9
   - board: nice60
   - board: xiao_ble
     shield: hummingbird