Add Renesas RZ/G3L RSPI support

Biju <biju.das.au@gmail.com> says:

This patch series adds binding and driver support for RSPI IP found on the
RZ/G3L SoC. The RSPI is compatible with RZ/V2H RSPI, but has 2 clocks
compared to 3 on RZ/V2H.

Link: https://patch.msgid.link/20260408085418.18770-1-biju.das.jz@bp.renesas.com

diff --cc Documentation/devicetree/bindings/spi/renesas,rzv2h-rspi.yaml
Simple merge

diff --cc drivers/spi/spi-fsl-lpspi.c
Simple merge

diff --cc drivers/spi/spi-stm32-ospi.c
Simple merge

diff --cc drivers/spi/spi.c
Simple merge

diff --cc include/linux/spi/spi.h
Simple merge