config: disable lockdep to save 6MB of RAM

As our kernel 3.10 is quite stable now, we can disable debugging features
to save some RAM and improve user experience.

Change-Id: If90d13e02c6c2c7bf22693a26a6b881d34298699
Tracked-On: https://jira01.devtools.intel.com/browse/AW-4529


Signed-off-by: Simon Dubray <simonx.dubray@intel.com>
Reviewed-on: https://android.intel.com/571069


Reviewed-by: Nassiet, GaelleX <gaellex.nassiet@intel.com>
Reviewed-by: jenkins_ndg <jenkins_ndg@intel.com>
Reviewed-by: Viel, ClementX <clementx.viel@intel.com>
Reviewed-by: Whitfield, MichaelX <michaelx.whitfield@intel.com>
Reviewed-by: Ledentec, AlexandreX <alexandrex.ledentec@intel.com>
Reviewed-by: Deverge, Jean-francoisX <jean-francoisx.deverge@intel.com>
Reviewed-by: Tasayco Loarte, VictorX <victorx.tasayco.loarte@intel.com>