arm: don't create useless copies to pass into debugfs_create_dir()

its first argument is const char * and it's really not modified...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/arm/mach-ux500/clock.c b/arch/arm/mach-ux500/clock.c
index 1d8509d..7d107be 100644
--- a/arch/arm/mach-ux500/clock.c
+++ b/arch/arm/mach-ux500/clock.c
@@ -636,15 +636,12 @@
 						struct dentry *p_dentry)
 {
 	struct dentry *d, *clk_d;
-	char s[255];
-	char *p = s;
+	const char *p = c->name;
 
-	if (c->name == NULL)
-		p += sprintf(p, "BUG");
-	else
-		p += sprintf(p, "%s", c->name);
+	if (!p)
+		p = "BUG";
 
-	clk_d = debugfs_create_dir(s, p_dentry);
+	clk_d = debugfs_create_dir(p, p_dentry);
 	if (!clk_d)
 		return NULL;