Resolve HPR-85

Closes HPR-85

libraries/base/axi4/src/vhdl/axi4_lite_mm_bridge.vhd

@@ -31,6 +31,8 @@
 --   . The read latency is not adapted. Ensure that the Controller and Peripheral use the same 
 --     read-latency.
 --   . Both AXI4-lite and MM use ready latency = 0 for waitrequest/ready.
+--   . AXI4-lite is assumed to use byte addressed registers while MM uses word addressed 
+--     registers.
 
 LIBRARY IEEE, common_lib;
 USE IEEE.STD_LOGIC_1164.ALL;