Revert "xhci: Handle spurious events on Etron host isoc enpoints"

This reverts commit 635be136 which is
commit b331a3d8 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: Iee1d0a1d9c4fb65fab9319bd0d7e8bededdec273
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>