dt-bindings: display: samsung,ams495qa01: add missing SPI properties ref

Samsung AMS495QA01 panel is a SPI device, so it should reference
spi-peripheral-props.yaml schema to allow and validate the SPI device
properties.

Fixes: 92be07c6

 ("dt-bindings: display: panel: Add Samsung AMS495QA01")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240509-dt-bindings-dsi-panel-reg-v1-1-8b2443705be0@linaro.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>