dt-bindings: pinctrl: cix,sky1-pinctrl: Drop duplicate newline

Fix the following DT schema check warning:

./Documentation/devicetree/bindings/pinctrl/cix,sky1-pinctrl.yaml:68:1: [warning] too many blank lines (2 > 1) (empty-lines)

One newline is enough. No functional change.

Signed-off-by: Marek Vasut <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

Documentation/devicetree/bindings/pinctrl/cix,sky1-pinctrl.yaml

···
             enum: [ 2, 3, 5, 6, 8, 9, 11, 12, 13, 14, 17, 18, 20, 21, 23,
                     24 ]
 
-
         required:
           - pinmux