defconfig: 8996: Enable cpu boost module

This driver does sync of CPU frequencies on migration of an important
thread from a fast CPU to a slow CPU. It also boosts CPU
scaling_min_freq to a userspace specified value on touch events.

Change-Id: Ic058777611286f0a8a81d6813c13e93cab3df5e0
Signed-off-by: Tapas Kumar Kundu <tkundu@codeaurora.org>