Revert "mm: Always release pages to the buddy allocator in memblock_free_late()."

This reverts commit 115d9d77bb0f9152c60b6e8646369fa7f6167593.

The pages being freed by memblock_free_late() have already been
initialized, but if they are in the deferred init range, __free_one_page()
might access nearby uninitialized pages when trying to coalesce buddies,
which will cause a crash.

A proper fix will be more involved so revert this change for the time
being.
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