T80: x86_64: make pmap region bigger.
// Location and size of virtual address space reserved for mapping
// frames backing refill_slabs
#define META_DATA_RESERVED_BASE (PML4_MAPPING_SIZE * (disp_get_core_id() + 1))
-#define META_DATA_RESERVED_SIZE (X86_64_BASE_PAGE_SIZE * 80000)
+#define META_DATA_RESERVED_SIZE (X86_64_BASE_PAGE_SIZE * 256000)
/**
* \brief Translate generic vregion flags to architecture specific pmap flags
