llama-cpp: allow to override ROCM GPU targets (#435263)

pkgs/by-name/ll/llama-cpp/package.nix

@@ -12,6 +12,7 @@
 
   rocmSupport ? config.rocmSupport,
   rocmPackages ? { },
+  rocmGpuTargets ? builtins.concatStringsSep ";" rocmPackages.clr.gpuTargets,
 
   openclSupport ? false,
   clblast,
@@ -146,8 +147,7 @@ effectiveStdenv.mkDerivation (finalAttrs: {
   ]
   ++ optionals rocmSupport [
     (cmakeFeature "CMAKE_HIP_COMPILER" "${rocmPackages.clr.hipClangPath}/clang++")
-    # TODO: this should become `clr.gpuTargets` in the future.
-    (cmakeFeature "CMAKE_HIP_ARCHITECTURES" rocmPackages.rocblas.amdgpu_targets)
+    (cmakeFeature "CMAKE_HIP_ARCHITECTURES" rocmGpuTargets)
   ]
   ++ optionals metalSupport [
     (cmakeFeature "CMAKE_C_FLAGS" "-D__ARM_FEATURE_DOTPROD=1")