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>

include/compiler.h

@@ -157,7 +157,7 @@ typedef unsigned long int uintptr_t;
 /**
  * tools_build() - check if we are building host tools
  *
- * @return true if building for the host, false if for a target
+ * Return: true if building for the host, false if for a target
  */
 static inline bool tools_build(void)
 {