zephyr/mpconfigport: Enable import of mpy and a few related features.

Support for importing .mpy files is quite fundamental to MicroPython these
days, eg it allows installing more efficient .mpy code via "mip install"
(and installing `unittest` only works with the .mpy version because the .py
version uses f-strings, which are not enabled on the zephyr port).  So
enable it generally for use by all boards.

As part of this, also enable:
- min/max: needed by `micropython/import_mpy_invalid.py`, and widely used
- sys.modules: needed by `run-tests.py` to run .mpy tests with --via-mpy
- io module: needed to run .mpy tests, and useful for `io.IOBase`
- array slice assign: needed to run .mpy tests, and generally useful as a
  way to do a memory copy.

Signed-off-by: Damien George <[email protected]>

Author: dpgeorge

ports/zephyr/mpconfigport.h

@@ -36,6 +36,7 @@
 #define MICROPY_HEAP_SIZE (16 * 1024)
 #endif
 
+#define MICROPY_PERSISTENT_CODE_LOAD (1)
 #define MICROPY_ENABLE_SOURCE_LINE  (1)
 #define MICROPY_STACK_CHECK         (1)
 #define MICROPY_ENABLE_GC           (1)
@@ -46,7 +47,6 @@
 #define MICROPY_PY_ASYNC_AWAIT      (0)
 #define MICROPY_PY_BUILTINS_BYTES_HEX (1)
 #define MICROPY_PY_BUILTINS_FILTER  (0)
-#define MICROPY_PY_BUILTINS_MIN_MAX (0)
 #define MICROPY_PY_BUILTINS_PROPERTY (0)
 #define MICROPY_PY_BUILTINS_RANGE_ATTRS (0)
 #define MICROPY_PY_BUILTINS_REVERSED (0)
@@ -55,9 +55,9 @@
 #define MICROPY_PY_BUILTINS_HELP    (1)
 #define MICROPY_PY_BUILTINS_HELP_TEXT zephyr_help_text
 #define MICROPY_PY_ARRAY            (0)
+#define MICROPY_PY_ARRAY_SLICE_ASSIGN (1)
 #define MICROPY_PY_COLLECTIONS      (0)
 #define MICROPY_PY_CMATH            (0)
-#define MICROPY_PY_IO               (0)
 #define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
 #define MICROPY_PY_MACHINE          (1)
 #define MICROPY_PY_MACHINE_INCLUDEFILE "ports/zephyr/modmachine.c"
@@ -97,7 +97,6 @@
 #define MICROPY_PY_TIME_INCLUDEFILE "ports/zephyr/modtime.c"
 #define MICROPY_PY_ZEPHYR           (1)
 #define MICROPY_PY_ZSENSOR          (1)
-#define MICROPY_PY_SYS_MODULES      (0)
 #define MICROPY_PY_SYS_STDFILES     (1)
 #define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_MPZ)
 #define MICROPY_FLOAT_IMPL (MICROPY_FLOAT_IMPL_FLOAT)