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

Add dummy clk which was missed during the conversion to
mtk_clk_pdev_probe() and is required for the existing DT bindings to
keep working.

Fixes: 65c10c5 ("clk: mediatek: Migrate to mtk_clk_pdev_probe() for multimedia clocks")
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://lore.kernel.org/r/9de23440fcba1ffef9e77d58c9f505105e57a250.1734300668.git.daniel@makrotopia.org
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/clk-mt2701-mm.c

@@ -31,6 +31,7 @@ static const struct mtk_gate_regs disp1_cg_regs = {
 	GATE_MTK(_id, _name, _parent, &disp1_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
 
 static const struct mtk_gate mm_clks[] = {
+	GATE_DUMMY(CLK_DUMMY, "mm_dummy"),
 	GATE_DISP0(CLK_MM_SMI_COMMON, "mm_smi_comm", "mm_sel", 0),
 	GATE_DISP0(CLK_MM_SMI_LARB0, "mm_smi_larb0", "mm_sel", 1),
 	GATE_DISP0(CLK_MM_CMDQ, "mm_cmdq", "mm_sel", 2),