Revert "pps: fix poll support"

This reverts commit 6ee76101 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: I99d7f56de6db057c6bb2c628675ff9ee318b65a2
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>