Specify dev nodes list file for ramdisk partition generation

Ramdisk partition requires "-n" argument to be passed when generating
the image file. Given that the value is agnostic to the target product
and is set to a constant value, this is implicitly set internally in
filesystem module.

Test: inspect ramdisk.img build command
Bug: 379190521
Change-Id: I01d0c1bf06e087ab49c71bdb0cfe48a08b9c7fc9