omap: various cleanups in platform code

Work in progress.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
defconfig: enabling swap again (and zram)

Many users confirmed what i thought; swap and or
zram is/are not the root of this data corruption
bug.
Therefore enable it back again, also clean up
4.1's defconfig

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
cpufreq: interactive: revert sampling_rate_suspend_time code

It may causes problems with wake ups, better revert it.

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