bricks/configport: Enable rmul.
This is used by the Color and Matrix types.
#define MICROPY_PY_COLLECTIONS (0)
#define MICROPY_PY_MATH (PYBRICKS_STM32_OPT_FLOAT)
#define MICROPY_PY_CMATH (0)
+#define MICROPY_PY_ALL_SPECIAL_METHODS (PYBRICKS_STM32_OPT_EXTRA_MOD)
+#define MICROPY_PY_REVERSE_SPECIAL_METHODS (PYBRICKS_STM32_OPT_EXTRA_MOD)
#define MICROPY_PY_IO (PYBRICKS_STM32_OPT_EXTRA_MOD)
#define MICROPY_PY_STRUCT (0)
#define MICROPY_PY_SYS (PYBRICKS_STM32_OPT_EXTRA_MOD)
