ASoC: rcar: fixup of_clk_add_provider() usage for multi clkout

Current adg is calling of_clk_add_povider() multiple times,
but it is not correct usage. This patch fixup its parameter
and call it once.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/adg.c

@@ -537,17 +537,15 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 			clk = clk_register_fixed_rate(dev, clkout_name[i],
 						      parent_clk_name, 0,
 						      req_rate);
-			if (!IS_ERR(clk)) {
+			adg->clkout[i] = ERR_PTR(-ENOENT);
+			if (!IS_ERR(clk))
+				adg->clkout[i] = clk;
+		}
 		adg->onecell.clks	= adg->clkout;
 		adg->onecell.clk_num	= CLKOUTMAX;
-
-				adg->clkout[i] = clk;
-
 		of_clk_add_provider(np, of_clk_src_onecell_get,
 				    &adg->onecell);
 	}
-		}
-	}
 
 	adg->ckr = ckr;
 	adg->rbga = rbga;