Renesas R-Car V4H (r8a779g0) has PCIe controller, and it requires
specific firmware downloading. So, add a document about the firmware
how to get.
Signed-off-by: Yoshihiro Shimoda <[email protected]>
[kwilczynski: commit log, refactor the document content and then add
this new file to a correct index under the top-level PCI documentation]
Signed-off-by: Krzysztof Wilczyński <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
