dlx: init: Set read-ahead to 512 KB

Change-Id: I632d65907803c9328f2db694ead35164c631ca24
dlx: init: Fix configuration of cpu-boost sync_freq

When a thread migrates, the cpu-boost driver adds a boost to:

* the current frequency if it is less than sync_freq
* sync_freq if the current frequency is greater than sync_freq

The idea being that you want to keep it boosted but not going
crazy.  The way this was previously configured always kept it
at the current frequency which could be needlessly burning
battery power.

Change-Id: If1074294b7c55024a5820c255bf2e81d9884d2b6
dlx: init: Configure cpu-boost's plug_boost

Using only a 1 ms boost for dlx because the dlx mpdecision is
very aggressive about bringing cores online.

The only purpose of this boost on dlx is to ensure that the core
doesn't come online at very low frequency and then take a little
time for the governor to correctly identify the load on it.

Change-Id: Ic56d375b91d35271cb593499ea172f877326a7fe
dlx: init: Tone down the cpu-boost driver

Change-Id: I8b52530d5ed7f5a3b88c4a148d235fee8881457d
Merge branch 'cm-11.0' into kk_mkt