spi: dt-bindings: st,stm32mp25-ospi: Make "resets" a required property

On STM32MP2x SoC's family, OSPI is child of Octo Memory Manager which
must have asccess to OSPI's reset to ensure its initialization.
Make "resets" a required property.

Fixes: bed97e35786a ("dt-bindings: spi: Add STM32 OSPI controller")
Signed-off-by: Patrice Chotard <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/spi/st,stm32mp25-ospi.yaml

···
   - compatible
   - reg
   - clocks
+  - resets
   - interrupts
   - st,syscfg-dlyb