moby: kernel: note that CONFIG_PREEMPT is required for boot AND so are the other options

though honestly i can't say why; the config diff is confusing

pkgs/additional/linux-sane-pinephonepro/default.nix

@@ -90,9 +90,10 @@ linux_latest.override {
         CRASH_DUMP = lib.mkForce yes;
         CRASH_RESERVE = yes;
 
+        # this is required for boot (but why??)
+        PREEMPT = lib.mkForce yes;
         # TODO: at least one of these is actually required for boot.
         PREEMPTION = yes;
-        PREEMPT = lib.mkForce yes;
         PREEMPT_BUILD = yes;
         PREEMPT_COUNT = yes;
         PREEMPT_RCU = yes;