Revert "pps: fix poll support"

This reverts commit 7ed42b79 which is
commit 12c409aa upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I4ed833a0aa7d8d9ea0768dd20ca8fcf8439da653
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>