[PATCH v5 0/1] MR6299: ntdll: Determine the available address space dynamically on all architectures.

[Garrett Mesmer (＠gmesmer)]

Resolves issue https://gitlab.winehq.org/wine/wine/-/merge_requests/3598#note_75871

The host address space limit may not be `0x7fffffff0000` on any architecture (eg: ARM64). Such architectures can fully emulate x86_64 Wine (eg: QEMU, FEX, BOX64) and need to have their host address space detected. Implementing the detection regardless of the Wine build architecture should not regress anything.

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  v5: ntdll: Determine the available address space dynamically for 64bit architectures.

https://gitlab.winehq.org/wine/wine/-/merge_requests/6299