dt-bindings: mediatek: mt8192: Fix dt_binding_check warning

Silence indentation level warning reported by dt_binding_check in
order to reduce noise during routine checks.

$ make dt_binding_check
mt8192-mt6359-rt1015-rt5682.yaml:10:4: [warning] wrong indentation:
expected 2 but found 3 (indentation)

Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://lore.kernel.org/r/20210126132531.2084711-2-robert.foss@linaro.org


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>