clk: meson: axg-audio: Don't reference clk_init_data after registration

A future patch is going to change semantics of clk_register() so that
clk_hw::init is guaranteed to be NULL after a clk is registered. Avoid
referencing this member here so that we don't run into NULL pointer
exceptions.

Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20190731193517.237136-4-sboyd@kernel.orgAcked-by: Neil Armstrong <narmstrong@baylibre.com>

drivers/clk/meson/axg-audio.c

@@ -992,15 +992,18 @@ static int axg_audio_clkc_probe(struct platform_device *pdev)
 
 	/* Take care to skip the registered input clocks */
 	for (i = AUD_CLKID_DDR_ARB; i < data->hw_onecell_data->num; i++) {
+		const char *name;
+
 		hw = data->hw_onecell_data->hws[i];
 		/* array might be sparse */
 		if (!hw)
 			continue;
 
+		name = hw->init->name;
+
 		ret = devm_clk_hw_register(dev, hw);
 		if (ret) {
-			dev_err(dev, "failed to register clock %s\n",
-				hw->init->name);
+			dev_err(dev, "failed to register clock %s\n", name);
 			return ret;
 		}
 	}