Add tool to program an FPGA

To program FPGAs with a bitstream, we currently either need to rely on
fusesoc, or open the Vivado GUI. This commit adds a command line tool to
do the same, based on the TCL code available in fusesoc/edalize.

Signed-off-by: Philipp Wagner <phw@lowrisc.org>
diff --git a/util/licence-checker.hjson b/util/licence-checker.hjson
index 206f8e3..f800022 100644
--- a/util/licence-checker.hjson
+++ b/util/licence-checker.hjson
@@ -58,6 +58,7 @@
     # Site Assets
     'site/**/assets/scss/**',
     'site/landing/static/js/tiny-slider.js',
+    'util/opentitan-pgm-fpga/vivado_pgm.tcl',
 
     # Code taken from Chromium, so covered by the BSD licence
     'sw/otbn/code-snippets/modexp.S',