sound: wcd9320: tidy up things a little bit. Only accept signed values from now on. The 'headset gain' will only be used to remove some gain noise, increasing it beyond 1 step above the default doesn't make a difference so rather just have it decrease the gain.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
sound_control: clean the code

* proper 80-char indentation
* add module_exit
* clean up the store functions using proper and modern kstroul
* use unsigned boost vars since we're not accepting negative
values anymore
* remove that stupid and useless version define
mako_hotplug: clean-up

* clean up the store functions using proper and modern kstrtoul

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

* fix a bug where cpu_smash()->cpus_cpufreq_work()->cpus_offline_work()
was being called every 100ms

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