boards: Convert dragino_lsn50 to HWM v2

Port the board to HWMv2.

Signed-off-by: Erwan Gouriou <erwan.gouriou@st.com>

boards/boards_legacy/arm/dragino_lsn50/Kconfig.defconfig

@@ -1,11 +0,0 @@
-# Dragino LSN50 LoRA Sensor Node board configuration
-
-# Copyright (c) 2018 Endre Karlson <endre.karlson@gmail.com>
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_DRAGINO_LSN50
-
-config BOARD
-	default "dragino_lsn50"
-
-endif # BOARD_DRAGINO_LSN50

boards/dragino/dragino_lsn50/Kconfig.dragino_lsn50

@@ -1,8 +1,5 @@
-# Dragino LSN50 LoRA Sensor Node board configuration
-
 # Copyright (c) 2018 Endre Karlson <endre.karlson@gmail.com>
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_DRAGINO_LSN50
-	bool "Dragino LSN50 Sensor Node"
-	depends on SOC_STM32L072XX
+	select SOC_STM32L072XX

boards/dragino/dragino_lsn50/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: dragino_lsn50
+  vendor: dragino
+  socs:
+    - name: stm32l072xx

boards/dragino/dragino_lsn50/doc/index.rst

@@ -101,8 +101,7 @@ The Zephyr Dragino LSN50 board configuration supports the following hardware fea
 Other hardware features are not yet supported on this Zephyr port.
 
 The default configuration can be found in the defconfig file:
-
-	``boards/arm/dragino_lsn50/dragino_lsn50_defconfig``
+:zephyr_file:`boards/dragino/dragino_lsn50/dragino_lsn50_defconfig`
 
 
 Connections and IOs

boards/dragino/dragino_lsn50/dragino_lsn50_defconfig

@@ -1,12 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # Zephyr Kernel Configuration
-CONFIG_SOC_SERIES_STM32L0X=y
-
 # Platform Configuration
-CONFIG_SOC_STM32L072XX=y
-CONFIG_BOARD_DRAGINO_LSN50=y
-
 # Serial Drivers
 CONFIG_SERIAL=y
 CONFIG_UART_INTERRUPT_DRIVEN=y

boards/dragino/index.rst

@@ -0,0 +1,10 @@
+.. _boards-dragino:
+
+Dragino
+#######
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   **/*