cpufrequtils: change sha256 hash to sri form

Signed-off-by: Christina Sørensen <[e-mail]>

pkgs/os-specific/linux/cpufrequtils/default.nix

···
 
   src = fetchurl {
     url = "http://ftp.be.debian.org/pub/linux/utils/kernel/cpufreq/cpufrequtils-${version}.tar.gz";
-    sha256 = "127i38d4w1hv2dzdy756gmbhq25q3k34nqb2s0xlhsfhhdqs0lq0";
+    hash = "sha256-AFOgcYPQaUg70GJhS8YcuAgMV32mHN9+ExsGThoa8Yg=";
   };
 
   patches = [