MIPS: jz4740: remove unnecessary null test before debugfs_remove

Fix checkpatch warning:
WARNING: debugfs_remove(NULL) is safe this check is probably not required
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7225/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/jz4740/clock-debugfs.c

@@ -87,8 +87,7 @@ void jz4740_clock_debugfs_add_clk(struct clk *clk)
 /* TODO: Locking */
 void jz4740_clock_debugfs_update_parent(struct clk *clk)
 {
-	if (clk->debugfs_parent_entry)
-		debugfs_remove(clk->debugfs_parent_entry);
+	debugfs_remove(clk->debugfs_parent_entry);
 
 	if (clk->parent) {
 		char parent_path[100];