Implement SPCI pull model for memory sharing.

Bug: 132420445
Change-Id: Iac21d7949bc54da13a4f25a317f5e83b2727638c
diff --git a/inc/hf/mm.h b/inc/hf/mm.h
index 43d4c79..6fb9296 100644
--- a/inc/hf/mm.h
+++ b/inc/hf/mm.h
@@ -79,6 +79,8 @@
 
 /* clang-format on */
 
+#define MM_PPOOL_ENTRY_SIZE sizeof(struct mm_page_table)
+
 struct mm_page_table {
 	alignas(PAGE_SIZE) pte_t entries[MM_PTE_PER_PAGE];
 };