Remove linux/android_pmem.h include.

This file is not needed any more, and does not exist in uapi kernel headers.

Change-Id: I930e2bbf98a89ac3e0162bb2df039d1f286ddd76
Merge "Remove linux/android_pmem.h include."
Merge branch 'master' of https://android.googlesource.com/device/lge/mako into HEAD