Revert "pps: fix poll support"

This reverts commit 232f4ac6 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: I833ab77abef492ace02702604fd9de1ebe7f1b80
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>