omap-cleanup-part2-for-v3.6

This branch contains more clean-up like changes and minor fixes for making
it easier to support new omap SoCs, such as omap5 and am33xx.

This branch has dependencies to earlier clean-up in omap-cleanup-for-v3.6
and  omap-devel-dmtimer-for-v3.6 branches, and also depends on the
omap-devel-am33xx-for-v3.6 branch, and are based on a merge of these
branches.
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