Revert "[moto] arch/arm/mach-omap2/omap4-sar: changes for sar restore"

This reverts commit ff20cec2cdbd4192b2cb3b0bc5e1ea445a5cb14c.

The reverted commit is an attempted workaround from motorola to fix OMAP
errata i719 which caused suspend/resume-problems leading at least to
increased battery usage.

The upstream-workaround for this errata from omapzoom is already applied
to this tree, so revert motorola's attempt.

Change-Id: Id559b94d5a354b922e53e6269da60924edf19f35