Staging: lustre: module: Replace function calls

Replace the calls of function cfs_trace_free_string_buffer() with
kfree() as the former function is not required.
Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com>
Acked-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/libcfs/module.c

@@ -392,7 +392,7 @@ static int __proc_dobitmasks(void *data, int write,
 	} else {
 		rc = cfs_trace_copyin_string(tmpstr, tmpstrlen, buffer, nob);
 		if (rc < 0) {
-			cfs_trace_free_string_buffer(tmpstr, tmpstrlen);
+			kfree(tmpstr);
 			return rc;
 		}
 
@@ -402,7 +402,7 @@ static int __proc_dobitmasks(void *data, int write,
 			*mask |= D_EMERG;
 	}
 
-	cfs_trace_free_string_buffer(tmpstr, tmpstrlen);
+	kfree(tmpstr);
 	return rc;
 }