regulator: mt6358: Add supply names for MT6366 regulators

regulator: mt6358: Add supply names for MT6366 regulators

The DT bindings for MT6366 regulator defines the supply names for the
PMIC.

Add support for them by adding .supply_name field settings for each
regulator. The buck regulators each have their own supply whose name
can be derived from the regulator name. The LDOs have shared supplies.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230928085537.3246669-12-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>