It's ~~~Environment~~~ time!
Logic has always detected all MIDI inputs.
caveat: I'm on Logic 9, but they can't change the Environment too much, someone can correct me if I'm wrong
This is an old picture I used to use for tutorials.
Use the number keys to get into the environment, select the Click & Ports layer.
See the Physical Input? there's a small box in the lower right hand corner you can drag and expand the Physical Input, at the top of the physical input you will see a cable leading from the Sum Out to the keyboard IN (left side of kybrd). Select the cable (turns black) like in the pic and delete it, your other inputs will be listed below the sum, each input has an output connection, can be confusing is you have many MIDI device. From the output junction referencing the MIDI IN you wish to use, drag a cable to the keyboard input.