doc: replace @return by Return:

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c
index 9887d09..ff0fa8a 100644
--- a/arch/sandbox/cpu/cpu.c
+++ b/arch/sandbox/cpu/cpu.c
@@ -73,7 +73,7 @@
  * which we can use to map back to the pointer later.
  *
  * @ptr: Pointer to check
- * @return true if this is within sandbox emulated DRAM, false if not
+ * Return: true if this is within sandbox emulated DRAM, false if not
  */
 static bool is_in_sandbox_mem(const void *ptr)
 {
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 40ebe32..d83c862 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -718,7 +718,7 @@
  * @argvp:  Returns newly allocated args list
  * @add_args: Arguments to add, each a string
  * @count: Number of arguments in @add_args
- * @return 0 if OK, -ENOMEM if out of memory
+ * Return: 0 if OK, -ENOMEM if out of memory
  */
 static int add_args(char ***argvp, char *add_args[], int count)
 {
@@ -764,7 +764,7 @@
  * execs it.
  *
  * @fname: Filename to exec
- * @return does not return on success, any return value is an error
+ * Return: does not return on success, any return value is an error
  */
 static int os_jump_to_file(const char *fname, bool delete_it)
 {
diff --git a/arch/sandbox/cpu/state.c b/arch/sandbox/cpu/state.c
index 4e82253..ce904b1 100644
--- a/arch/sandbox/cpu/state.c
+++ b/arch/sandbox/cpu/state.c
@@ -101,7 +101,7 @@
  * @state: Sandbox state
  * @io: Method to use for reading state
  * @blob: FDT containing state
- * @return 0 if OK, -EINVAL if the read function returned failure
+ * Return: 0 if OK, -EINVAL if the read function returned failure
  */
 int sandbox_read_state_nodes(struct sandbox_state *state,
 			     struct sandbox_state_io *io, const void *blob)
@@ -190,7 +190,7 @@
  *
  * @state: Sandbox state
  * @io: Method to use for writing state
- * @return 0 if OK, -EIO if there is a fatal error (such as out of space
+ * Return: 0 if OK, -EIO if there is a fatal error (such as out of space
  * for adding the data), -EINVAL if the write function failed.
  */
 int sandbox_write_state_node(struct sandbox_state *state,