all: Convert nlr_raise(mp_obj_new_exception_msg(x)) to mp_raise_msg(x).

This helper function was added a while ago and these are the remaining
cases to convert, to save a bit of code size.

ports/esp8266/modesp.c

@@ -43,7 +43,7 @@
 
 void error_check(bool status, const char *msg) {
     if (!status) {
-        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, msg));
+        mp_raise_msg(&mp_type_OSError, msg);
     }
 }