linux_4_{14,19}: restore __kernel_fpu_{begin,restore} (#63665)

linux_4_{14,19}: restore __kernel_fpu_{begin,restore}

pkgs/top-level/all-packages.nix

···
         # when adding a new linux version
         kernelPatches.cpu-cgroup-v2."4.11"
         kernelPatches.modinst_arg_list_too_long
+        kernelPatches.export_kernel_fpu_functions
       ];
   };
 
···
     kernelPatches =
       [ kernelPatches.bridge_stp_helper
         kernelPatches.modinst_arg_list_too_long
+        kernelPatches.export_kernel_fpu_functions
       ];
   };