BoardConfig: removed unneeded TARGET_DISABLE_ARM_PIE flag and some cosmetic fixes

* ı tested it on my cm11 test build and there is no error while compiling and camera is working without this
* and ADC did the same
Increase ZRAM swap size to 192MB

 * Used in CAF for 512MB devices
Reduce background app limit to 16

 * For low memory devices, the original limit of 24 would be
   impractical anyways since it cannot contain that many apps.

   (from CAF)
Allow more background services

 * Some services or broadcast may get tremendous delay because
   of the limited background services. It will bring about many
   issues like alarmmanagerservice's wakelock held too long.

   (from CAF)
Remove length parameter for encryption