Symptom
Wrong README file in 17.3.1 and 16.12.4 release. The README is missing some AP models per AP image:
16.12.3:
ap1g5 : AP1815, AP154x <--- 1850 is missing
ap1g4 : AP180x, AP183x, AP185x <--- AP180x should be replaced with AP181x
ap1g7 : C9115, C9120
ap1g6 : C9117
ap1g6a : C9130
ap3g3 : AP380x, AP280x, AP156x <--- AP480x is missing here
17.3.1:
ap1g8 : C9105, C9110 <--- There is no platform called C9110
ap1g5 : AP1815, AP154x <--- 1850 is missing
ap1g4 : AP180x, AP183x, AP185x <--- AP180x should be replaced with AP181x
ap1g7 : C9115, C9120
ap1g6 : C9117
ap1g6a : C9130
ap3g3 : AP380x, AP280x, AP156x <--- AP480x is missing here
Workaround
Check web published documentation for up to date supported APs