Describe the QSPI FLASH on the Gray Hawk Single board.
Signed-off-by: Cong Dang <cong.dang.xn@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/96d6567024cef9fcd6b04f92a697301c1c8d1d8e.1708354463.git.geert+renesas@glider.be