Add DT compatible string for DH electronics STM32MP13xx DHCOR SoM and DHSBC carrier board. This stm32mp135f-dhcor-dhsbc board is a stack of DHCOR SoM based on STM32MP135F SoC (900MHz / crypto capabilities) populated on DHSBC carrier board. The SoM contains the following peripherals: - STPMIC (power delivery) - 512MB DDR3L memory - eMMC and SDIO WiFi module The DHSBC carrier board contains the following peripherals: - Two RGMII Ethernet ports - USB-A Host port, USB-C peripheral port, USB-C power supply plug - Expansion connector Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>