dt-bindings: net: ti: k3-am654-cpsw-nuss: Drop pinmux header

Drop the pinmux header reference as it is not used. Examples should
just show the node definition.

Acked-by: Krzysztof Kozlowski <[e-mail]>
Acked-by: Linus Walleij <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Nishanth Menon <[e-mail]>

Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/pinctrl/k3.h>
     #include <dt-bindings/soc/ti,sci_pm_domain.h>
     #include <dt-bindings/net/ti-dp83867.h>
     #include <dt-bindings/interrupt-controller/irq.h>