ARM: OMAP2+: second set of hwmod changes for v4.6

These patches add RTC support for the AM43xx, and add support for
the DRA7xx eDMA controller's TPCC, TPTC0, and TPTC1 IP blocks.
Also included is a workaround for PRCM hardreset control of the DRA7xx
PCIe subsystem.

Note that I do not have a DRA7xx board, and therefore cannot
test any patches for that SoC family.

Basic build, boot, and PM test logs can be found here:

http://www.pwsan.com/omap/testlogs/omap-hwmod-b-for-v4.6/20160301021258/
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