dt-bindings: reset: mediatek: Add infra_ao reset index for MT8186

dt-bindings: reset: mediatek: Add infra_ao reset index for MT8186

To support reset of infra_ao, add the index of infra_ao reset of
thermal/svs for MT8186.

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220523093346.28493-18-rex-bc.chen@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>