Create Efinix Adapter

Split the project into two parts, the adapter will connect the cpu
directly to the FPGA, and the shield will house all of the peripherals.

I will get the adapter first so that I can get things like sdram
working first, and then make the shield with things like SD card, USB,
maybe even ethernet and VGA. Basically anthing since it's connected to
an FPGA.

hw/efinix_adapter/.gitignore

@@ -0,0 +1,29 @@
+# For PCBs designed using KiCad: https://www.kicad.org/
+# Format documentation: https://kicad.org/help/file-formats/
+
+# Temporary files
+*.000
+*.bak
+*.bck
+*.kicad_pcb-bak
+*.kicad_sch-bak
+*-backups
+*.kicad_prl
+*.sch-bak
+*~
+_autosave-*
+*.tmp
+*-save.pro
+*-save.kicad_pcb
+fp-info-cache
+
+# Netlist files (exported from Eeschema)
+*.net
+
+# Autorouter files (exported from Pcbnew)
+*.dsn
+*.ses
+
+# Exported BOM files
+*.xml
+*.csv