msm: hotplug: Update default fast_lane_load

A value of 99% load catches almost all spikes and keeps spurious
onlinings to an absolute minimum.

[ neo: Also change condition checking to first check for load and
  then check for current frequency. ]

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
Revert "msm8974: Restore voltages" partly

Just no revert for voltage at 300 MHz.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>