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)
 {