ARM: dts: renesas: r9a06g032-rzn1d400-db: Add QSPI node including NOR flash

ARM: dts: renesas: r9a06g032-rzn1d400-db: Add QSPI node including NOR flash

Enable the QSPI controller to access the connected SPI NOR flash. The
NOR datasheet may suggest faster tuning parameters but those did not
work on my board.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260305220023.28257-2-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>