soc: mediatek: pm-domains: Add a power domain names for mt8192

Add the power domains names for the mt8192 SoC.

Fixes: a49d5e7a ("soc: mediatek: pm-domains: Add support for mt8192")
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Hsin-Yi Wang <hsinyi@chromium.org>
Link: https://lore.kernel.org/r/20210225175000.824661-3-enric.balletbo@collabora.com


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>