mtd: s3c2410 nand: Remove uncessary null check

clk_get() return a pointer to the struct clk or an ERR_PTR().

Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
index b0f8e77..868685d 100644
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -723,7 +723,7 @@
 
 	/* free the common resources */
 
-	if (info->clk != NULL && !IS_ERR(info->clk)) {
+	if (!IS_ERR(info->clk)) {
 		s3c2410_nand_clk_set_state(info, CLOCK_DISABLE);
 		clk_put(info->clk);
 	}