boards: Convert nucleo_l452re_p to HWM v2

Port the board to HWMv2. Introduce it as variant of nucleo_l452re

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

boards/st/nucleo_l452re/Kconfig.defconfig

@@ -4,10 +4,10 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-if BOARD_NUCLEO_L452RE || BOARD_NUCLEO_L452RE_P
+if BOARD_NUCLEO_L452RE
 
 config SPI_STM32_INTERRUPT
 	default y
 	depends on SPI
 
-endif # BOARD_NUCLEO_L452RE || BOARD_NUCLEO_L452RE_P
+endif # BOARD_NUCLEO_L452RE

boards/st/nucleo_l452re/board.yml

@@ -3,3 +3,5 @@ board:
   vendor: st
   socs:
     - name: stm32l452xx
+      variants:
+        - name: p

boards/st/nucleo_l452re/doc/index.rst

@@ -134,6 +134,9 @@ Other hardware features are not yet supported on this Zephyr port.
 The default configuration can be found in the defconfig file:
 ``boards/st/nucleo_l452re/nucleo_l452re_defconfig``
 
+And for Nucleo L452RE-P in this defconfig file:
+``boards/st/nucleo_l452re/nucleo_l452re_stm32l452xx_p_defconfig``
+
 
 Connections and IOs
 ===================
@@ -218,6 +221,13 @@ Now build and flash an application. Here is an example for
    :board: nucleo_l452re
    :goals: build flash
 
+For Nucleo L452RE-P, use this command instead:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: nucleo_l452re/stm32l452xx/p
+   :goals: build flash
+
 You should see the following message on the console:
 
 .. code-block:: console

boards/st/nucleo_l452re/nucleo_l452re_stm32l452xx_p.yaml

@@ -1,4 +1,4 @@
-identifier: nucleo_l452re_p
+identifier: nucleo_l452re/stm32l452xx/p
 name: ST Nucleo L452RE-P
 type: mcu
 arch: arm

boards/st/nucleo_l452re/nucleo_l452re_stm32l452xx_p_defconfig

@@ -1,8 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_STM32L4X=y
-CONFIG_SOC_STM32L452XX=y
-
 # enable uart driver
 CONFIG_SERIAL=y