Gov. Kathy Hochul spared a Long Island granddad’s pee-themed license plate from getting flushed down the toilet after the DMV had revoked the tags. Motorist Seth Bykofsky, 69, had asked the Democratic governor to step in to pardon his vanity plate PB4WEGO and Hochul answered the call Tuesday afternoon — hours after a web report by The Post on the plea. Hochul personally called the West Hempstead man on Tuesday just to inform him after he spent weeks petitioning to hold onto his plates that promote hitting the facilities prior to buckling in.