Use copyright as file header

lib/src/phy/phch/test/pusch_nr_bler_test.c

@@ -1,3 +1,12 @@
+/**
+ * \copyright Copyright 2013-2021 Software Radio Systems Limited
+ *
+ * \copyright By using this file, you agree to the terms and conditions set
+ * forth in the LICENSE file which can be found at the top level of
+ * the distribution.
+ *
+ */
+
 /**
  * \file pusch_nr_bler_test.c
  * \brief BLER and throughput test for PUSCH NR.
@@ -22,12 +31,6 @@
  * pusch_nr_bler_test -p 52 -m 2 -T 64qam -s -1.8 -f
  * \endcode
  *
- * \copyright Copyright 2013-2021 Software Radio Systems Limited
- *
- * \copyright By using this file, you agree to the terms and conditions set
- * forth in the LICENSE file which can be found at the top level of
- * the distribution.
- *
  */
 
 #include "srsran/phy/channel/ch_awgn.h"