add CPU BKMs doc
add CPU BKMs doc

Signed-off-by: YAO Matrix <4f2f5096877db473be5be541cbdfd0a6eed685a2@126.com>

yao-matrix/mProto,yao-matrix/mProto,yao-matrix/mProto,yao-matrix/mProto,yao-matrix/mProto