Revert "clocksource: Reduce clocksource-skew threshold"

This reverts commit cacc6c30 which is
commit 2e27e793 upstream.

It breaks the Android kernel ABI and is not an issue for Android
systems, so revert it.

Bug: 161946584
Fixes: cacc6c30 ("clocksource: Reduce clocksource-skew threshold")
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I4d6c0cc253459fad083a55bcfc2b06ff217c5cab