ARM: 9091/1: Revert "mm: qsd8x50: Fix incorrect permission faults"

This reverts commit e220ba60

.

The VERIFY_PERMISSION_FAULT is introduced since 2009 but no
one use it, just revert it and clean unused comment.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>