cpufreq: interactive: squash in my optimized interactive governor

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
arm: switch to XZ compression

gzip: File size ~ 4 MB
xz:   File size ~ 2 MB

(This time for real).

Signed-off-by: Blechd0se <alex.christ@hotmail.de>