stmhal/moduselect: Move to extmod/ for reuse by other ports.
diff --git a/py/mpconfig.h b/py/mpconfig.h
index 1980e64..4572fc4 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -873,6 +873,11 @@
 #define MICROPY_PY_UERRNO (0)
 #endif
 
+// Whether to provide "uselect" module (baremetal implementation)
+#ifndef MICROPY_PY_USELECT
+#define MICROPY_PY_USELECT (0)
+#endif
+
 // Whether to provide "utime" module functions implementation
 // in terms of mp_hal_* functions.
 #ifndef MICROPY_PY_UTIME_MP_HAL