Mention Dell 9550 NVidia in Read Me and flake.nix

Author: Ericson2314

README.md

@@ -87,6 +87,7 @@ See code for all available configurations.
 | [Dell XPS 13 9380][]              | `<nixos-hardware/dell/xps/13-9380>`                |
 | [Dell XPS 15 7590][]              | `<nixos-hardware/dell/xps/15-7590>`                |
 | [Dell XPS 15 9550][]              | `<nixos-hardware/dell/xps/15-9550>`                |
+| [Dell XPS 15 9550, nvidia][]      | `<nixos-hardware/dell/xps/15-9550/nvidia>`         |
 | [Dell XPS 15 9560][]              | `<nixos-hardware/dell/xps/15-9560>`                |
 | [Dell XPS 15 9560, intel only][]  | `<nixos-hardware/dell/xps/15-9560/intel>`          |
 | [Dell XPS 15 9560, nvidia only][] | `<nixos-hardware/dell/xps/15-9560/nvidia>`         |

flake.nix

@@ -22,6 +22,7 @@
       dell-xps-13-9380 = import ./dell/xps/13-9380;
       dell-xps-15-7590 = import ./dell/xps/15-7590;
       dell-xps-15-9550 = import ./dell/xps/15-9550;
+      dell-xps-15-9550-nvidia = import ./dell/xps/15-9550/nvidia;
       dell-xps-15-9560 = import ./dell/xps/15-9560;
       dell-xps-15-9560-intel = import ./dell/xps/15-9560/intel;
       dell-xps-15-9560-nvidia = import ./dell/xps/15-9560/nvidia;