clk: rockchip: Remove superfluous error message in rockchip_clk_register_cpuclk()

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

drivers/clk/rockchip/clk-cpu.c

@@ -322,8 +322,6 @@ struct clk *rockchip_clk_register_cpuclk(const char *name,
 					     sizeof(*rates) * nrates,
 					     GFP_KERNEL);
 		if (!cpuclk->rate_table) {
-			pr_err("%s: could not allocate memory for cpuclk rates\n",
-			       __func__);
 			ret = -ENOMEM;
 			goto unregister_notifier;
 		}