haskell.compiler.*: NCG is no longer available on sparc for >= 9.4

https://downloads.haskell.org/~ghc/9.4.1/docs/users_guide/9.4.1-notes.html

Author: sternenseemann

pkgs/development/compilers/ghc/common-hadrian.nix

@@ -41,7 +41,6 @@
 
 , useLLVM ? !(stdenv.targetPlatform.isx86
               || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc
               || stdenv.targetPlatform.isAarch64
               || stdenv.targetPlatform.isGhcjs
               || (lib.versionAtLeast version "9.12" && stdenv.targetPlatform.isRiscV64))

pkgs/development/compilers/ghc/common-make-native-bignum.nix

@@ -38,7 +38,7 @@
     !(
       stdenv.targetPlatform.isx86
       || stdenv.targetPlatform.isPower
-      || stdenv.targetPlatform.isSparc
+      || (lib.versionOlder version "9.4" && stdenv.targetPlatform.isSparc)
       || (lib.versionAtLeast version "9.2" && stdenv.targetPlatform.isAarch64)
     ),
   # LLVM is conceptually a run-time-only dependency, but for