mm: treat level 0 page entries as blocks.

This simplifies the abstraction so all page table levels have entries
that are:

   1. absent
   2. tables -- references a next level table
   3. block -- references a memory block, including a basic page

The arch implementation is left to handle the differences in
representation at the different levels.

Change-Id: If0d65d6ee727a699eb60d2375e1fda282e8ee3a8
diff --git a/src/load.c b/src/load.c
index b55455a..cd81237 100644
--- a/src/load.c
+++ b/src/load.c
@@ -123,11 +123,12 @@
 
 		/* Map the 1TB of memory. */
 		/* TODO: We should do a whitelist rather than a blacklist. */
-		if (!mm_vm_identity_map(&primary_vm.ptable, pa_init(0),
-					pa_init(1024ull * 1024 * 1024 * 1024),
-					MM_MODE_R | MM_MODE_W | MM_MODE_X |
-						MM_MODE_NOINVALIDATE,
-					NULL)) {
+		if (!mm_vm_identity_map(
+			    &primary_vm.ptable, pa_init(0),
+			    pa_init(UINT64_C(1024) * 1024 * 1024 * 1024),
+			    MM_MODE_R | MM_MODE_W | MM_MODE_X |
+				    MM_MODE_NOINVALIDATE,
+			    NULL)) {
 			dlog("Unable to initialise memory for primary vm\n");
 			return false;
 		}