dt-bindings: clock: vc5: Add 5P49V6975

The 5P49V6975 is a member of the VersaClock 6E family and supports four
fractional dividers (FODs), five clock outputs and an internal oscillator.
Signed-off-by: Matthias Fend <matthias.fend@emfend.at>
Link: https://lore.kernel.org/r/20220511053455.360335-1-matthias.fend@emfend.atSigned-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/idt,versaclock5.yaml

@@ -56,6 +56,7 @@ properties:
       - idt,5p49v5935
       - idt,5p49v6901
       - idt,5p49v6965
+      - idt,5p49v6975
 
   reg:
     description: I2C device address
@@ -134,6 +135,7 @@ allOf:
           enum:
             - idt,5p49v5933
             - idt,5p49v5935
+            - idt,5p49v6975
     then:
       # Devices with builtin crystal + optional external input
       properties: