spi: dt-bindings: samsung: Add fsd spi compatible

Adds spi controller dt-binding compatible information for
Tesla Full Self-Driving (FSD) SoC.

Cc: linux-fsd@tesla.com
Signed-off-by: Adithya K V <adithya.kv@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Andi Shyti <andi@etezian.org>
Link: https://lore.kernel.org/r/20220308121640.27344-1-alim.akhtar@samsung.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/spi/samsung,spi.yaml

@@ -21,6 +21,7 @@ properties:
           - samsung,s3c6410-spi
           - samsung,s5pv210-spi # for S5PV210 and S5PC110
           - samsung,exynos5433-spi
+          - tesla,fsd-spi
       - const: samsung,exynos7-spi
         deprecated: true