Revert "xpmem: Support large page attachment"

This reverts commit a8696d811d.

Conflicts:
	kernel/include/process.h
	kernel/syscall.c
	kernel/xpmem.c

Change-Id: I726e74450f6228d3fc78fc62dda15b2067732a53

test/issues/1259/mc_run.sh

@@ -1,15 +0,0 @@
-#!/usr/bin/env bash
-
-test -e /tmp/xpmem.share && rm -f /tmp/xpmem.share
-test -e /tmp/xpmem.lock && rm -f /tmp/xpmem.lock
-
-# create TMP_SHARE_SIZE bytes defined in xpmem_test.h
-for i in `seq 0 31` ; do
-	echo -n 0 >> /tmp/xpmem.share
-done
-echo 0 > /tmp/xpmem.lock
-
-# Run the main test app
-mcexec $PWD/xpmem_master
-exit 0
-