FileNVRAM module import, will restore boot-args if variable is set.

git-svn-id: http://forge.voodooprojects.org/svn/chameleon@2169 b5af796a-00a8-11df-919b-ffff7a100b7d
Add FileNVRAM api

git-svn-id: http://forge.voodooprojects.org/svn/chameleon@2170 b5af796a-00a8-11df-919b-ffff7a100b7d