clk: mediatek: add support for APMIXED parent in infra MUX

Add support for APMIXED parent in infra MUX. This is the case for mt7622
that reference APMIXED parents for the MUX1_SEL clock.

We assume the second level parent is always APMIXED.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

drivers/clk/mediatek/clk-mtk.c

@@ -489,6 +489,10 @@ static ulong mtk_find_parent_rate(struct mtk_clk_priv *priv, struct clk *clk,
 	switch (flags & CLK_PARENT_MASK) {
 	case CLK_PARENT_XTAL:
 		return priv->tree->xtal_rate;
+	/* Assume the second level parent is always APMIXED */
+	case CLK_PARENT_APMIXED:
+		priv = dev_get_priv(priv->parent);
+		fallthrough;
 	case CLK_PARENT_TOPCKGEN:
 		return mtk_clk_find_parent_rate(clk, parent, priv->parent);
 	default: