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>

include/lmb.h

@@ -21,6 +21,7 @@ struct lmb_property {
 
 struct lmb_region {
 	unsigned long cnt;
+	unsigned long max;
 	struct lmb_property region[MAX_LMB_REGIONS+1];
 };