ARM: dts: stm32: Add pinmux nodes for DH electronics STM32MP13xx DHCOR SoM and DHSBC board

Add new pinmux nodes for DH electronics STM32MP13xx DHCOR SoM and DHSBC board.
The following pinmux nodes are added:
- ADC pins
- ADC CC pins
- ETH1 pins
- ETH2 pins
- I2C5 pins
- MCAN1 pins
- MCAN2 pins
- PWM13 pins
- PWM5 pins
- QSPI pins
- SAI1 pins
- SDMMC2 D4..D7 pins
- SPI2 pins
- SPI3 pins
- UART4 pins
- UART7 pins
- USART1 pins
- USART2 pins

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>