dts: bindings: ospi: Require STM32 OSPI clock-names binding

Following the modification of the STM32 OSPI driver, the clock-names
binding is now required

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Author: gautierg-st

dts/bindings/ospi/st,stm32-ospi.yaml

@@ -37,6 +37,9 @@ properties:
     pinctrl-names:
       required: true
 
+    clock-names:
+      required: true
+
     dmas:
       description: |
         Optional DMA channel specifier, required for DMA transactions.