Make USE_COMPUTED_GOTO a config option in mpconfig.h.
Disabled by default. Enabled in unix port.
diff --git a/py/mpconfig.h b/py/mpconfig.h
index f9c02a6..8f60c99 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -154,6 +154,12 @@
#define MICROPY_PATH_MAX (512)
#endif
+// Whether to use computed gotos in the VM, or a switch
+// Computed gotos are roughly 10% faster, and increase VM code size by a little
+#ifndef MICROPY_USE_COMPUTED_GOTO
+#define MICROPY_USE_COMPUTED_GOTO (0)
+#endif
+
// Additional builtin function definitions - see builtintables.c:builtin_object_table for format.
#ifndef MICROPY_EXTRA_BUILTINS
#define MICROPY_EXTRA_BUILTINS