rpi: add link to revision number details
rpi: add link to revision number details

gavincabbage/embd,dboyliao/embd,gale320/embd,pctj101/embd,dboyliao/embd,kidoman/embd,ryancox/embd,gavincabbage/embd,kidoman/embd,pctj101/embd,ryancox/embd,gale320/embd