mshv: Use PMD_ORDER instead of HPAGE_PMD_ORDER when processing regions

Fix page order determination logic when CONFIG_PGTABLE_HAS_HUGE_LEAVES
is undefined, as HPAGE_PMD_SHIFT is defined as BUILD_BUG in that case.

Fixes: abceb42 ("mshv: Fix huge page handling in memory region traversal")
Signed-off-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>

Author: Stanislav Kinsburskii

drivers/hv/mshv_regions.c

@@ -58,7 +58,7 @@ static long mshv_region_process_chunk(struct mshv_mem_region *region,
 
 	page_order = folio_order(page_folio(page));
 	/* The hypervisor only supports 4K and 2M page sizes */
-	if (page_order && page_order != HPAGE_PMD_ORDER)
+	if (page_order && page_order != PMD_ORDER)
 		return -EINVAL;
 
 	stride = 1 << page_order;