defconfig: 8994: Enable msm_performance module

This module provides support to userspace entity for hotplugging
and setting cpufreq policy min/max limits.
A userspace entity can specify a CPU mask and the number of CPUs
it wants online within that mask and this module will try to make
a best effort to keep those many CPUs online.
Userspace can also specify the min and max limits on CPUs instead
of writing to the scaling_min/max nodes from sysfs so that if any
CPU is offline this module maintains a vote for it which is applied
once the CPU comes back online.

Change-Id: I24953ea391459c86fb4314aee50dbfb4cfc603dc
Signed-off-by: Rohit Gupta <rohgup@codeaurora.org>