mod_for_factory: Fix factory images for tegra2
mod_for_factory: Fix factory images for tegra2

- Conditionally patch chrontel.conf
- Add a patch for nvrm to start on factory, so that X can start.

BUG=crosbug.com/p/1721
TEST=Built and run factory image for tegra2_seaboard

Change-Id: Ied87b6d959f940ef8e99e124ab419fdeea48aa26

Review URL: http://codereview.chromium.org/5126005

mjg59/scripts,trnubo/scripts,marineam/coreos-scripts,gtank/scripts,bcwaldon/coreos-scripts,andrejro/coreos--scripts,crawford/scripts,endocode/scripts,trnubo/scripts,crawford/scripts,sigma/coreos-scripts,andrejro/coreos--scripts,mischief/scripts,vmware/coreos-scripts,mischief/scripts,smilart/scripts,trnubo/scripts,fivethreeo/scripts,glevand/coreos--scripts,mischief/scripts,zhang0137/scripts,marineam/coreos-scripts,coreos/scripts,bcwaldon/coreos-scripts,vmware/coreos-scripts,vmware/coreos-scripts,zhang0137/scripts,fivethreeo/scripts,mjg59/scripts,nicescale/scripts,bcwaldon/coreos-scripts,sigma/coreos-scripts,coreos/scripts,nicescale/scripts,endocode/scripts,glevand/coreos--scripts,fivethreeo/scripts,zhang0137/scripts,mjg59/scripts,marineam/coreos-scripts,smilart/scripts,smilart/scripts,nicescale/scripts,gtank/scripts,gtank/scripts,andrejro/coreos--scripts,BugRoger/scripts,crawford/scripts,BugRoger/scripts,endocode/scripts,BugRoger/scripts,sigma/coreos-scripts