defconfigs: Disable keyboard dock driver for Note 10.1 devices

This driver always reports itself as present even when the keyboard
is not.  This causes the software keyboard to be disabled.  Almost no
one has this accessory anyway - so disable it until someone who
actually has a keyboard to test with can fix this broken driver.

Change-Id: I5b5350d01b77da63d915004b6d525088ca74e0f7