phy: qcom: qmp-pcie: refactor clock register code

The PCIe Gen4x2 PHY found in the SM8[456]50 SoCs have a second clock,
in order to expose it, split the current clock registering in two parts:
- CCF clock registering
- DT clock registering

Keep the of_clk_add_hw_provider/devm_add_action_or_reset to keep
compatibility with the legacy subnode bindings.

Signed-off-by: Neil Armstrong <[e-mail]>
Reviewed-by: Dmitry Baryshkov <[e-mail]>
Link: https://lore.kernel.org/r/202[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/phy/qualcomm/phy-qcom-qmp-pcie.c

···
 	struct clk_init_data init = { };
 	int ret;
 
-	ret = of_property_read_string(np, "clock-output-names", &init.name);
+	ret = of_property_read_string_index(np, "clock-output-names", 0, &init.name);
 	if (ret) {
 		dev_err(qmp->dev, "%pOFn: No clock-output-names\n", np);
 		return ret;
···
 
 	fixed->hw.init = &init;
 
-	ret = devm_clk_hw_register(qmp->dev, &fixed->hw);
+	return devm_clk_hw_register(qmp->dev, &fixed->hw);
+}
+
+static int qmp_pcie_register_clocks(struct qmp_pcie *qmp, struct device_node *np)
+{
+	int ret;
+
+	ret = phy_pipe_clk_register(qmp, np);
 	if (ret)
 		return ret;
 
-	ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &fixed->hw);
+	ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &qmp->pipe_clk_fixed.hw);
 	if (ret)
 		return ret;
 
···
 	if (ret)
 		goto err_node_put;
 
-	ret = phy_pipe_clk_register(qmp, np);
+	ret = qmp_pcie_register_clocks(qmp, np);
 	if (ret)
 		goto err_node_put;