pmdomain: mediatek: Move bools to a flags field

pmdomain: mediatek: Move bools to a flags field

To simplify the macros, use a flags field for simple bools. This is in
preparation for more flags.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Tested-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://lore.kernel.org/r/20230918093751.1188668-3-msp@baylibre.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>