By Tuvan GumrukcuANKARA, March 10 (Reuters) - Turkey said on Tuesday that a U.S. Patriot air defence system was deployed to its southeast, near a NATO radar base, as part of steps by the alliance to boost air defences in the face of missile threats from the Iran war.It is being deployed to Malatya province, the location of the Kurecik NATO radar base, which provides vital data for the alliance and helped identify two Iranian ballistic missiles heading toward Turkey over the last week.