board: stmp32mp1: split board and SOC STM32MP15 configuration

Add a configuration file "stm32mp15_st_common.h" to handle the
STMicroelectronics boards configuration and rename stm32mp1.h to
"stm32mp15_common.h" to handle the generic STM32MP15x series configuration.

The configuration file "dh_stm32mp1.h" is also renamed to
"stm32mp15_dh_dhcom" for the configuration of board based on the
dhelectronics STM32MP15x SOM.

In the STMicroelectronics board configuration the default bootcmd
"bootcmd_stm32mp" is updated to only select the extlinux file found on
SD-Card on STM32MP15x EV1 for boot from NOR device.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

stm32mp1: dynamically build DFU_ALT_INFO

This patch reduces the stm32mp1 environment size and
builds dynamically the DFU board configuration with gpt
and mtd partitions and information from defconfig
(CONFIG_DFU_ALT_RAM0).

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>

ARM: stm32: Implement board coding on AV96

The AV96 board does exist in multiple variants. To cater for all of
them, implement board code handling. There are two GPIOs which code
the type of the board, read them out and use the value to pick the
correct device tree from an fitImage.

Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Change-Id: Iddb330b9a66500495885457cbe17edc0eacaaf43

ARM: dts: stm32: Add DH Electronics DHCOM SoM and PDK2 board

Add support for DH Electronics DHCOM SoM and PDK2 rev. 400 carrier
board. This is an SoM with STM32MP15xx and an evaluation kit. The
baseboard provides Ethernet, UART, USB, CAN and optional display.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>

stm32mp1: dynamically build DFU_ALT_INFO

This patch reduces the stm32mp1 environment size and
builds dynamically the DFU board configuration with gpt
and mtd partitions and information from defconfig
(CONFIG_DFU_ALT_RAM0).

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>

ARM: stm32: Implement board coding on AV96

The AV96 board does exist in multiple variants. To cater for all of
them, implement board code handling. There are two GPIOs which code
the type of the board, read them out and use the value to pick the
correct device tree from an fitImage.

Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Change-Id: Iddb330b9a66500495885457cbe17edc0eacaaf43

ARM: dts: stm32: Add DH Electronics DHCOM SoM and PDK2 board

Add support for DH Electronics DHCOM SoM and PDK2 rev. 400 carrier
board. This is an SoM with STM32MP15xx and an evaluation kit. The
baseboard provides Ethernet, UART, USB, CAN and optional display.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>

ARM: dts: stm32: Add DH Electronics DHCOM SoM and PDK2 board

Add support for DH Electronics DHCOM SoM and PDK2 rev. 400 carrier
board. This is an SoM with STM32MP15xx and an evaluation kit. The
baseboard provides Ethernet, UART, USB, CAN and optional display.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>