Add Sony ILCE-7RM3A alias
Add Sony ILCE-7RM3A alias

Sample on RPU [is now available](https://github.com/darktable-org/rawspeed/pull/286#issuecomment-896581910).
LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed