boards: Convert stm32f030_demo to HWM v2

Port the board to HWMv2.

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

boards/arm/stm32f030_demo/Kconfig.defconfig

@@ -1,9 +0,0 @@
-# Copyright (c) 2019 Antony Pavlov <antonynpavlov@gmail.com>
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_STM32F030_DEMO
-
-config BOARD
-	default "stm32f030_demo"
-
-endif # BOARD_STM32F030_DEMO

boards/v2/others/stm32f030_demo/Kconfig.stm32f030_demo

@@ -2,5 +2,4 @@
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_STM32F030_DEMO
-	bool "STM32F030 DEMO Board"
-	depends on SOC_STM32F030X4
+	select SOC_STM32F030X4

boards/v2/others/stm32f030_demo/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: stm32f030_demo
+  vendor: others
+  socs:
+    - name: stm32f030x6

boards/v2/others/stm32f030_demo/stm32f030_demo_defconfig

@@ -1,11 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # Zephyr Kernel Configuration
-CONFIG_SOC_SERIES_STM32F0X=y
-
 # Platform Configuration
-CONFIG_SOC_STM32F030X4=y
-
 # Kernel Options due to Low Memory (4k)
 CONFIG_MAIN_STACK_SIZE=640
 CONFIG_IDLE_STACK_SIZE=200