clk: rockchip: remove redundant checking of device_node

rockchip_clk_of_add_provider is used by sub-clk driver which
already call of_iomap before calling it. If device_node does
not exist, of_iomap returns NULL which will fail to init the
sub-clk driver. So really it's redundant.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

drivers/clk/rockchip/clk.c

@@ -359,11 +359,9 @@ err_free:
 void __init rockchip_clk_of_add_provider(struct device_node *np,
 				struct rockchip_clk_provider *ctx)
 {
-	if (np) {
-		if (of_clk_add_provider(np, of_clk_src_onecell_get,
-					&ctx->clk_data))
-			pr_err("%s: could not register clk provider\n", __func__);
-	}
+	if (of_clk_add_provider(np, of_clk_src_onecell_get,
+				&ctx->clk_data))
+		pr_err("%s: could not register clk provider\n", __func__);
 }
 
 struct regmap *rockchip_clk_get_grf(struct rockchip_clk_provider *ctx)