[PATCHv5 09/19] x86/mm: Make MAX_PHYSADDR_BITS and MAX_PHYSMEM_BITS dynamic

For boot-time switching between paging modes, we need to be able to adjust size of physical address space at runtime. As part of making physical address space size variable, we have to make X86_5LEVEL dependent on SPARSEMEM_VMEMMAP. !SPARSEMEM_VMEMMAP configuration doesn't work well with variable

[PATCHv5 09/19] x86/mm: Make MAX_PHYSADDR_BITS and MAX_PHYSMEM_BITS dynamic

For boot-time switching between paging modes, we need to be able to adjust size of physical address space at runtime. As part of making physical address space size variable, we have to make X86_5LEVEL dependent on SPARSEMEM_VMEMMAP. !SPARSEMEM_VMEMMAP configuration doesn't work well with variable