This commit adds files in preperation of adding ethernet drivers for the STM32H563 and Nucleo-H563ZI board.
It also modifies the pinmap to include ethernet pins (and cleaned up leftover comments from L5 file), as well as
add those pins to the board.h for the nucleo-h563zi.
Files added:
- arch/arm/src/stm32h5/hardware/stm32_ethernet.h
- arch/arm/src/stm32h5/hardware/stm32_sbs.h
- Not fully implemented, just register necessary for ethernet driver.