dt-bindings: spi: Document sam9x7 QSPI

Document the sam9x7 quad spi that supports interface to serial memories
operating in

- Single-bit SPI, Dual SPI, Quad SPI and Octal SPI
- Single Data Rate or Double Data Rate modes

Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20250908-microchip-qspi-v2-1-8f3d69fdd5c9@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Dharma Balasubiramani

Documentation/devicetree/bindings/spi/atmel,quadspi.yaml

@@ -17,6 +17,7 @@ properties:
     enum:
       - atmel,sama5d2-qspi
       - microchip,sam9x60-qspi
+      - microchip,sam9x7-ospi
       - microchip,sama7g5-qspi
       - microchip,sama7g5-ospi