ARM: OMAP2+: PRCM and hwmod changes for v4.3

This series adds:

- I/O wakeup support for AM43xx
- register lock and unlock support to the hwmod code (needed for the RTC
  IP blocks on some chips)
- several fixes for sparse warnings and an unnecessary null pointer test
- a DRA7xx clockdomain configuration workaround, to deal with some hardware
  bugs

Basic build, boot, and PM tests are here:

http://www.pwsan.com/omap/testlogs/hwmod-prcm-for-v4.3/20150723080012/

Since I do not have an AM43xx or DRA7xx device, I can't test on those
platforms.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=dZvv
-----END PGP SIGNATURE-----