dt-bindings: spmi: spmi-mtk-pmif: Add compatible for MT8188

dt-bindings: spmi: spmi-mtk-pmif: Add compatible for MT8188

Add compatible string for the SPMI block on MT8188 SoC, which is
compatible with the one used on MT8195.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Fei Shao <fshao@chromium.org>
Link: https://lore.kernel.org/r/20240911143429.850071-2-fshao@chromium.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.dleregno@collabora.com>
Link: https://lore.kernel.org/r/20241109002829.160973-3-sboyd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>