Revert "epoll: use freezable blocking call"

This reverts commit 1c441e921201 (epoll: use freezable blocking call)
which is reported to cause user space memory corruption to happen
after suspend to RAM.

Since it appears to be extremely difficult to root cause this
problem, it is best to revert the offending commit and try to address
the original issue in a better way later.

Change-Id: Ib57a2bda6c190454ae3bd3ae7eeb1456ea2156a6
References: https://bugzilla.kernel.org/show_bug.cgi?id=61781
Reported-by: Natrio <natrio@list.ru>
Reported-by: Jeff Pohlmeyer <yetanothergeek@gmail.com>
Bisected-by: Leo Wolf <jclw@ymail.com>
Fixes: 1c441e921201 (epoll: use freezable blocking call)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: 3.11+ <stable@vger.kernel.org> # 3.11+
Git-commit: c511851de162e8ec03d62e7d7feecbdf590d881d
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-stable.git
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>