adding Sipeed M1, M1W and M1s
Footprint MR kicad-footprints!3691
M1/M1W datasheet https://dl.sipeed.com/shareURL/MAIX/HDK/Sipeed-M1&M1W/Specifications
M1s datasheet + schematic https://dl.sipeed.com/shareURL/MAIX/M1s/M1s/1_Specification, https://dl.sipeed.com/shareURL/MAIX/M1s/M1s/2_Schematic
M1/M1W Footprint MR kicad-footprints!1590 (merged) (there seems to be a duplicate MR for that part that has got inactive, perhaps would be better to close it as duplicate)