clk: mediatek: mt2701-img: add missing dummy clk

clk: mediatek: mt2701-img: add missing dummy clk

Add dummy clk for index 0 which was missed during the conversion to
mtk_clk_simple_probe().

Fixes: 973d1607d936 ("clk: mediatek: mt2701: use mtk_clk_simple_probe to simplify driver")
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://lore.kernel.org/r/d677486a5c563fe5c47aa995841adc2aaa183b8a.1734300668.git.daniel@makrotopia.org
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>