arm64: dts: mediatek: mt6359: give regulators unique names

Change the regulator-name properties to be unique for all regulators.
U-Boot cannot handle duplicate names.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

[ upstream commit: d91639d0ab3223b61c00442021dc639c9ddc2b76 ]

(cherry picked from commit 22ce1d7d45a696128b8ad2cb9fbc4f2073bcb4f6)

Reviewed-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20260611-mtk-pick-dt-mt6359-unique-names-v1-1-601546be1210@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>