dt-bindings: i2c: i2c-stm32f7: allow clock-frequency range

For STM32F7, STM32H7 and STM32MP1 SoCs, if timing parameters
match, the bus clock frequency can be from 1Hz to 1MHz.
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml

@@ -80,11 +80,11 @@ properties:
   clock-frequency:
     description: Desired I2C bus clock frequency in Hz. If not specified,
                  the default 100 kHz frequency will be used.
-                 For STM32F7, STM32H7 and STM32MP1 SoCs, Standard-mode,
-                 Fast-mode and Fast-mode Plus are supported, possible
-                 values are 100000, 400000 and 1000000.
+                 For STM32F7, STM32H7 and STM32MP1 SoCs, if timing parameters
+                 match, the bus clock frequency can be from 1Hz to 1MHz.
     default: 100000
-    enum: [100000, 400000, 1000000]
+    minimum: 1
+    maximum: 1000000
 
 required:
   - compatible