Add initial support for EOS 5DS R, values are untested, but crop&black areas are correct.
Add initial support for EOS 5DS R, values are untested, but crop&black areas are correct.

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