Define the Condor/V3HSK board dependent parts of the RPC-IF device node.
Add device nodes for Spansion S25FS512S SPI flash and MTD partitions on it.

Based on the original patches by Dmitry Shifrin.
Signed-off-by: Dmitry Shifrin <dmitry.shifrin@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Link: https://lore.kernel.org/r/322ca212-a45f-cd2c-f1eb-737f0aa42d22@cogentembedded.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>