dt-bindings: net: dsa: sja1105: Fix indentation warnings

Some of the lines aren't properly indented, causing yamllint to warn
about them:

.../nxp,sja1105.yaml:70:17: [warning] wrong indentation: expected 18 but found 16 (indentation)

Use the proper indentation to fix those warnings.

Signed-off-by: Thierry Reding <[e-mail]>
Fixes: 070f5b701d559ae1 ("dt-bindings: net: dsa: sja1105: add SJA1110 bindings")
Tested-by: Geert Uytterhoeven <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml

···
           reg:
             oneOf:
               - enum:
-                - 0
-                - 1
+                  - 0
+                  - 1
 
         required:
           - compatible