clk: socfpga: clk-pll: Remove unused variable 'rc'

Fix the following build warning:
  drivers/clk/socfpga/clk-pll.c: In function ‘__socfpga_pll_init’:
  drivers/clk/socfpga/clk-pll.c:83:6: warning: variable ‘rc’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Jian Xin <xinjian@yulong.com>
Link: https://lore.kernel.org/r/20210609073742.722911-1-xinjian34324@163.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/socfpga/clk-pll.c

@@ -80,7 +80,6 @@ static __init struct clk_hw *__socfpga_pll_init(struct device_node *node,
 	const char *parent_name[SOCFPGA_MAX_PARENTS];
 	struct clk_init_data init;
 	struct device_node *clkmgr_np;
-	int rc;
 	int err;
 
 	of_property_read_u32(node, "reg", &reg);
@@ -114,7 +113,7 @@ static __init struct clk_hw *__socfpga_pll_init(struct device_node *node,
 		kfree(pll_clk);
 		return ERR_PTR(err);
 	}
-	rc = of_clk_add_provider(node, of_clk_src_simple_get, hw_clk);
+	of_clk_add_provider(node, of_clk_src_simple_get, hw_clk);
 	return hw_clk;
 }