ARM: DTS: stm32: add stm32h743i-eval files

ARM: DTS: stm32: add stm32h743i-eval files

This file is imported from linux kernel v4.13

Add device tree support for STM32H743 evaluation board.
This board offers :
  _ STM32H743XIH6 microcontroller with 2 Mbytes of
    Flash memory and 1 Mbyte of RAM in TFBGA240+25 package
  _ 5.7” 640x480 TFT color LCD with touch screen
  _ Ethernet compliant with IEEE-802.3-2002
  _ USB OTG HS and FS
  _ I2 C compatible serial interface
  _ RTC with rechargeable backup battery
  _ SAI Audio DAC
  _ ST-MEMS digital microphones
  _ 8-Gbyte (or more) SDIO3.0 interface microSD™ card
  _ 8Mx32bit SDRAM, 1Mx16bit SRAM and 8Mx16bit NOR Flash
  _ 1-Gbit Twin Quad-SPI NOR Flash
  _ Potentiometer
  _ 4 colored user LEDs
  _ Reset, wakeup, tamper or key buttons
  _ Joystick with 4-direction control and selector
  _ Board connectors :
     Power jack
     3 USB with Micro-AB
     RS-232 communications
     Ethernet RJ45
     FD-CAN compliant connection
     Stereo headset jack including analog microphone input
     2 audio jacks for external speakers
     microSD™ card
     JTAG/SWD and ETM trace
   _ Expansion connectors:
     Extension connectors and memory connectors for daughterboard
     or wire-wrap board
   _ Flexible power-supply options: ST-LINK USB VBUS or external
     sources
   _ On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration
     capability: mass storage, virtual COM port and debug port

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>