cpufreq: boostfreq: do not set to current value

dbs_tuners_ins.boostfreq should not be set upon boosting, as it
will fix the boostfreq to the current max value, despite the
fact that it can change later (via cpufreq reconfiguration)

Change-Id: I12741ff367b37d6161e06f3d5de21807c5415a9d
remove +sign from kernel localversion

Signed-off-by: Keff <funnykeff91@gmail.com>
bring own defconfig
Makefile: switch to cfX-Toolchain and enable O3 optimization