doc: group the bbb constants together
doc: group the bbb constants together

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