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>
diff --git a/drivers/clk/clk-stm32h7.c b/drivers/clk/clk-stm32h7.c
index d3271ec..0ea7261 100644
--- a/drivers/clk/clk-stm32h7.c
+++ b/drivers/clk/clk-stm32h7.c
@@ -1216,7 +1216,7 @@ static void __init stm32h7_rcc_init(struct device_node *np)
 	/* get RCC base @ from DT */
 	base = of_iomap(np, 0);
 	if (!base) {
-		pr_err("%s: unable to map resource", np->name);
+		pr_err("%pOFn: unable to map resource", np);
 		goto err_free_clks;
 	}