lmb: add a max parameter in the struct lmb_region

Add a max parameter in lmb_region struct to handle test
in lmb_add_region without using the MAX_LMB_REGIONS
define.

This patch allows to modify these size independently for
memory of reserved regions in the next patches.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/include/lmb.h b/include/lmb.h
index a324754..f3397c7 100644
--- a/include/lmb.h
+++ b/include/lmb.h
@@ -21,6 +21,7 @@
 
 struct lmb_region {
 	unsigned long cnt;
+	unsigned long max;
 	struct lmb_property region[MAX_LMB_REGIONS+1];
 };