platform-drivers-x86 for 4.2-2

A new intel_pmc_ipc driver, a symmetrical allocation and free fix in
dell-laptop, a couple minor fixes, and some updated documentation in the
dell-laptop comments.

intel_pmc_ipc:
 - Add Intel Apollo Lake PMC IPC driver

tc1100-wmi:
 - Delete an unnecessary check before the function call "kfree"

dell-laptop:
 - Fix allocating & freeing SMI buffer page
 - Show info about WiGig and UWB in debugfs
 - Update information about wireless control
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