By Foo Yun Chee BRUSSELS (Reuters) – Spain on Monday won backing from Europe’s top court in its mutli-million euros damage claim against The London Steam-Ship Owners Mutual Insurance Association for a massive oil spill on its northwestern coast two decades ago. The 2002 sinking of the Greek oil tanker Prestige, which was sailing to Gibraltar, released an estimated 63,000 tones of foul-smelling black fuel along the Galicia coast and forced the closure of Spain’s richest fishing grounds. It led to a lengthy dispute between The London Steam-Ship Owners’ Mutual Insurance Association Limited, the i…