update nmigen-boards

eda/nmigen-boards.nix

@@ -6,8 +6,8 @@ python3Packages.buildPythonPackage {
 
   src = fetchgit {
     url = "https://github.com/m-labs/nmigen-boards";
-    rev = "835c175d7cf9d143aea2c7dbc0c870ede655cfc2";
-    sha256 = "1v0bsy5ccikxmxmsmgq2s14g4dy0df8ka2s6av49833zigjrvh12";
+    rev = "bc074915d6c67a33447d4730b720b37e3ea4bb3f";
+    sha256 = "1qp32783p0bg6fxfj0wd7fd3if8az7w1r521wcbznxakdrqhrqjd";
     leaveDotGit = true;
   };