Added read documentation for i2c multiple interface
Added read documentation for i2c multiple interface

open-power/eCMD,mklight/eCMD,open-power/eCMD,open-power/eCMD,mklight/eCMD,mklight/eCMD,mklight/eCMD,mklight/eCMD,open-power/eCMD,open-power/eCMD