Add load support for Nikon D600.
Add load support for Nikon D600.

LebedevRI/rawspeed,LebedevRI/rawspeed,klauspost/rawspeed,mgehre/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,klauspost/rawspeed,anarsoul/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,anarsoul/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,mgehre/rawspeed,anarsoul/rawspeed