Revert "omap4-common: enable swapping to zram"

Seems to induce lag for many people.

This reverts commit eeb0af687e8fe3ea72e13eef6b677b1a910f42c7.

Change-Id: If5a89c43da0e21c9d595fba226941a9409c0c669
Merge remote-tracking branch 'upstream/cm-11.0' into cm-11.0