Add SPDX tags for RISC-V files. (#513)

Requested in http://openocd.zylin.com/#/c/5821/3

Change-Id: I95551a3311d8e128300bacdf463da7ab4edf29a0

src/target/riscv/asm.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #ifndef TARGET__RISCV__ASM_H
 #define TARGET__RISCV__ASM_H
 

src/target/riscv/batch.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

src/target/riscv/batch.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #ifndef TARGET__RISCV__SCANS_H
 #define TARGET__RISCV__SCANS_H
 

src/target/riscv/gdb_regs.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #ifndef TARGET__RISCV__GDB_REGS_H
 #define TARGET__RISCV__GDB_REGS_H
 

src/target/riscv/opcodes.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #include "encoding.h"
 
 #define ZERO	0

src/target/riscv/program.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

src/target/riscv/program.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #ifndef TARGET__RISCV__PROGRAM_H
 #define TARGET__RISCV__PROGRAM_H
 

src/target/riscv/riscv-011.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 /*
  * Support for RISC-V, debug version 0.11. This was never an officially adopted
  * spec, but SiFive made some silicon that uses it.

src/target/riscv/riscv-013.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 /*
  * Support for RISC-V, debug version 0.13, which is currently (2/4/17) the
  * latest draft.

src/target/riscv/riscv.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #include <assert.h>
 #include <stdlib.h>
 #include <time.h>

src/target/riscv/riscv.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #ifndef RISCV_H
 #define RISCV_H
 

src/target/riscv/riscv_semihosting.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 /***************************************************************************
  *   Copyright (C) 2018 by Liviu Ionescu                                   *
  *   ilg@livius.net                                                        *