Remove include <linux/android_pmem.h>

This file is not needed any more and it doesn't exist in the uapi kernel
headers.

Bug: 11559337

(cherry pick from commit 452b39701108170215ec0c1fc23a97baefc97f15)

Change-Id: I573658dbd7f860f12e1b65efc637301418610e9f
1 file changed