msm8960: HTC: enable KSM and CPU alignment

Change-Id: Ib2728e1f0cdb57579d34c0000f844dfdee6b5b56
UKSM-0.1.2.2 for v3.4.x
evita: enable uksm
lib/sradix-tree.c: fixed warning: ‘item’ may be used uninitialized in this function [-Wmaybe-uninitialized]
mm/uksm.c: fix build errors