Provide all doxygen framework boilerplate. Provide a very initial stub .c file to ensure that heirarchical headers are pulled in properly.
The f4 quadspi implementation was moved to the -v1 file, so the copyright should have moved with it.
Move the STM32F4 QuadSPI peripheral defines to the common folder as the F4 and H7 variants of the IP share almost all the same bits. For those bits that are separate put them into their own headers.
Karl Palsson