There are no plans for N450 support with FSP. Intel is coming out with an E6xx version of FSP later this year, which will be enabled on a new dev kit in the market called, Minnowboard (http://www.minnowboard.org).
There is a BLDK for N450 which is fond on the Embedded Design Center (http://www.intel.com/go/bldk). Scroll nearly to the bottom of the page and look for the section entitled,
Intel Atom processors 400 and 500 series with Intel® 82801HM I/O Controller Hub (Intel® ICH8M): Formerly Luna Pier (Pineview + ICH8M).