Fix return value in error case of new ddrclk type.

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Merge tag 'v4.9-rockchip-clkfixes1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into clk-fixes

Fix return value in error case of new ddrclk type.

* tag 'v4.9-rockchip-clkfixes1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  clk: rockchip: don't return NULL when failing to register ddrclk branch

drivers/clk/rockchip/clk-ddr.c

@@ -144,11 +144,8 @@ struct clk *rockchip_clk_register_ddrclk(const char *name, int flags,
 	ddrclk->ddr_flag = ddr_flag;
 
 	clk = clk_register(NULL, &ddrclk->hw);
-	if (IS_ERR(clk)) {
-		pr_err("%s: could not register ddrclk %s\n", __func__,	name);
+	if (IS_ERR(clk))
 		kfree(ddrclk);
-		return NULL;
-	}
 
 	return clk;
 }