Fixes for omaps against v4.6-rc1. Mostly minor fixes for the newer

SoCs with few board fixes and a fix for a long time hwmod bug:

- Fix cpsw_emac0 link type for baltos-ir5221

- Fix interrupt type for TWD

- Fix edma memcpy channel allocation for am43x

- Fix am43x-epos sycntimer32k by using the correct assigned clock

- Fix interconnect barrier for dra7

- Fix a long time hwmod bug for updating sysconfig register properly

- Fix flakey booting on dm814x where USB reset needs a delay

And there is one minor change that is not strictly a fix, but is
good to have for proper hardware detection:

- Detect dra7 silicon revision 2.0 properly
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