gateware: Initial import of all common parts

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/gateware/common/fw/.gitignore b/gateware/common/fw/.gitignore
new file mode 100644
index 0000000..03515f6
--- /dev/null
+++ b/gateware/common/fw/.gitignore
@@ -0,0 +1,3 @@
+*.elf
+*.bin
+*.hex