The ASoC: dt-bindings: fsl-sai: Fix mx6ul and mx7d compatible strings
dropped i.MX93 SAI compatible string, reinstate it.

Fixes: 81b6c043 ("ASoC: dt-bindings: fsl-sai: Fix mx6ul and mx7d compatible strings")
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20221208035354.255438-1-marex@denx.deSigned-off-by: Mark Brown <broonie@kernel.org>