cpufreq: cpu-boost: Increase sync thread policy and priority

More or less all cpufreq related threads run in a high priority.

Also, CMs patch series was somehow out of sync and incomplete,
readd the unchanged policy update to source cpu bit. And readd
the check for a possible corner case in try_to_wake_up() that
was already missing before.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
input: touchboost: boost less and for less time on thread migrations and load based syncs.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>

Conflicts:
	drivers/cpufreq/cpu-boost.c

Change-Id: Ia2104a1ad7d73d992426da5359ec43c9a9ff1f9e
input: touchboost: shut up.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
touchboost: no point in boosting if the destination cpu is the same as source cpu in my opinion.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>