ports: Disable async/await on bare-arm, minimal, pic16bit, cc3200.

It costs 1188 bytes of code on Thumb 2 archs.

bare-arm/mpconfigport.h

@@ -20,6 +20,7 @@
 #define MICROPY_ENABLE_DOC_STRING   (0)
 #define MICROPY_ERROR_REPORTING     (MICROPY_ERROR_REPORTING_TERSE)
 #define MICROPY_BUILTIN_METHOD_CHECK_SELF_ARG (0)
+#define MICROPY_PY_ASYNC_AWAIT (0)
 #define MICROPY_PY_BUILTINS_BYTEARRAY (0)
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (0)
 #define MICROPY_PY_BUILTINS_ENUMERATE (0)

cc3200/mpconfigport.h

@@ -75,6 +75,7 @@
 #define MICROPY_STREAMS_NON_BLOCK                   (1)
 #define MICROPY_MODULE_WEAK_LINKS                   (1)
 #define MICROPY_CAN_OVERRIDE_BUILTINS               (1)
+#define MICROPY_PY_ASYNC_AWAIT (0)
 #define MICROPY_PY_BUILTINS_TIMEOUTERROR            (1)
 #define MICROPY_PY_ALL_SPECIAL_METHODS              (1)
 #ifndef DEBUG

minimal/mpconfigport.h

@@ -22,6 +22,7 @@
 #define MICROPY_ENABLE_DOC_STRING   (0)
 #define MICROPY_ERROR_REPORTING     (MICROPY_ERROR_REPORTING_TERSE)
 #define MICROPY_BUILTIN_METHOD_CHECK_SELF_ARG (0)
+#define MICROPY_PY_ASYNC_AWAIT      (0)
 #define MICROPY_PY_BUILTINS_BYTEARRAY (0)
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (0)
 #define MICROPY_PY_BUILTINS_ENUMERATE (0)

pic16bit/mpconfigport.h

@@ -43,6 +43,7 @@
 #define MICROPY_ENABLE_SOURCE_LINE  (0)
 #define MICROPY_ENABLE_DOC_STRING   (0)
 #define MICROPY_ERROR_REPORTING     (MICROPY_ERROR_REPORTING_TERSE)
+#define MICROPY_PY_ASYNC_AWAIT      (0)
 #define MICROPY_PY_BUILTINS_BYTEARRAY (0)
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (0)
 #define MICROPY_PY_BUILTINS_FROZENSET (0)