clk: axi-clkgen: Migrate to clk_hw based OF and registration APIs

Now that we have clk_hw based provider APIs to register clks, we
can get rid of struct clk pointers while registering clks in
these drivers, allowing us to move closer to a clear split of
consumer and provider clk APIs.

Cc: Lars-Peter Clausen <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/clk-axi-clkgen.c

···
 	const char *parent_names[2];
 	const char *clk_name;
 	struct resource *mem;
-	struct clk *clk;
 	unsigned int i;
+	int ret;
 
 	if (!pdev->dev.of_node)
 		return -ENODEV;
···
 	axi_clkgen_mmcm_enable(axi_clkgen, false);
 
 	axi_clkgen->clk_hw.init = &init;
-	clk = devm_clk_register(&pdev->dev, &axi_clkgen->clk_hw);
-	if (IS_ERR(clk))
-		return PTR_ERR(clk);
+	ret = devm_clk_hw_register(&pdev->dev, &axi_clkgen->clk_hw);
+	if (ret)
+		return ret;
 
-	return of_clk_add_provider(pdev->dev.of_node, of_clk_src_simple_get,
-				    clk);
+	return of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_simple_get,
+				      &axi_clkgen->clk_hw);
 }
 
 static int axi_clkgen_remove(struct platform_device *pdev)