spi: sh-msiof: Enforce fixed DTDL for R-Car H3

Documentation says only DTDL of 200 is allowed for this SoC.

Fixes: 4286db84 ("spi: sh-msiof: Add R-Car Gen 2 and 3 fallback bindings")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://msgid.link/r/20231212081239.14254-1-wsa+renesas@sang-engineering.com


Signed-off-by: Mark Brown <broonie@kernel.org>