clk: Convert to using %pOFn instead of device_node.name

In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.

Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: linux-clk@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/renesas/clk-rcar-gen2.c

@@ -445,8 +445,8 @@ static void __init rcar_gen2_cpg_clocks_init(struct device_node *np)
 
 		clk = rcar_gen2_cpg_register_clock(np, cpg, config, name);
 		if (IS_ERR(clk))
-			pr_err("%s: failed to register %s %s clock (%ld)\n",
-			       __func__, np->name, name, PTR_ERR(clk));
+			pr_err("%s: failed to register %pOFn %s clock (%ld)\n",
+			       __func__, np, name, PTR_ERR(clk));
 		else
 			cpg->data.clks[i] = clk;
 	}