recovery: start in lower performance mode

Change-Id: I88bf823c9a07b090e4e1cdf14782851ad372b00b
remove redundant ksm config

These values are overriden in init.cm.rc and enabling
KSM here doesn't do anything either (other than enable
it during booting). KSM needs to be enabled in the memory
management settings.

Change-Id: I02713bc7987e145e39620dc09907574c5a649ed1