stm32/mpconfigport.h: Enable math.factorial, optimised version.
#define MICROPY_OPT_COMPUTED_GOTO (1)
#define MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE (0)
#define MICROPY_OPT_MPZ_BITWISE (1)
+#define MICROPY_OPT_MATH_FACTORIAL (1)
// Python internal features
#define MICROPY_READER_VFS (1)
#define MICROPY_PY_COLLECTIONS_DEQUE (1)
#define MICROPY_PY_COLLECTIONS_ORDEREDDICT (1)
#define MICROPY_PY_MATH_SPECIAL_FUNCTIONS (1)
+#define MICROPY_PY_MATH_FACTORIAL (1)
#define MICROPY_PY_CMATH (1)
#define MICROPY_PY_IO (1)
#define MICROPY_PY_IO_IOBASE (1)
