[CentOS] grub2 - add NVME to boot from - how?

Tue Aug 14 11:30:11 UTC 2018
lejeczek <peljasz at yahoo.co.uk>

hi guys,

I thought I should ask before I start fiddling and break something - can 
we tell grub2 to add nvme device as an option to boot from?

And if yes then what do tell grub?

many thanks, L.