qcom-common: Enable Krait retention

 * Enable new Krait retention mode on 3.4 kernel
 * Also online all CPUs at boot

Change-Id: I204a36734796cb2b6d1c465b03b7637c4d25948b
switch default IO Sched to ROW:

msm8960 have full support for Qcom new ROW scheduler
provides superior performance for d2

Change-Id: I73317f1ad9da5452d2e3d408527099d74c6b4782