Most of what should be reused is gained from the tune-atom file. The reset should be independently configurable. Make n450.conf resemble that of the other atom based BSPs in meta-intel.
http://git.yoctoproject.org/cgit/cgit.cgi/meta-intel/commit/?id=5c41b9b6a245664543e6ddd440d10a0696caaf7b
As I opened it, provided the fix, and tested it, I'm marking this as verified as well.