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py/emitglue: Always flush caches when assigning native ARM code.
Prior to this commit, cache flushing for ARM native code was done only in the assembler code asm_thumb_end_pass()/asm_arm_end_pass(), at the last pass of the assembler. But this misses flushing the cache when loading native code from an .mpy file, ie in persistentcode.c. The change here makes sure the cache is always flushed/cleaned/invalidated when assigning native code on ARM architectures. This problem was found running tests/micropython/import_mpy_native_gc.py on the mimxrt port. Signed-off-by: Damien George <[email protected]>
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