Add Addressmap block size to generated package (#134)

* add map size as a localparam in rdl map package

* rename from _SIZE -> _BYTES_SIZE

* fix names on new test & localparam

* wrap map size in SVInt

tests/test_map_size/tb_template.sv

@@ -0,0 +1,12 @@
+{% extends "lib/tb_base.sv" %}
+
+{% block seq %}
+    {% sv_line_anchor %}
+    ##1;
+    cb.rst <= '0;
+    ##1;
+
+    // check block size
+    assert(regblock_pkg::REGBLOCK_SIZE == {{exporter.ds.top_node.size}});
+
+{% endblock %}