linux-5.10.21: Replace md sync patch

When a mdraid recovery/check is paused by writing "idle" to sync_action,
sometimes the system deadlocks [1].

The latest fix proposed by the maintainer is not valid [2].

Use the fix we proposed ourself [3] until upstream comes up with
something better.

[1]: https://lore.kernel.org/linux-raid/5ed54ffc-ce82-bf66-4eff-390cb23bc1ac@molgen.mpg.de/T/#m28b00fdf4749f55c83282b20485c554ec199a108
[2]: https://lore.kernel.org/linux-raid/7fdb9726-4b1f-e04c-2451-f47139ddc05b@cloud.ionos.com/T/#m78c755f6b43a9c06d2c85b9d4e49c19657ddb155
[3]: https://lore.kernel.org/linux-raid/5ed54ffc-ce82-bf66-4eff-390cb23bc1ac@molgen.mpg.de/T/#m8a1d4c25781b8c3032ef38e3ffec425714515a16

linux-5.10.21-373.bee

@@ -23,7 +23,7 @@ fi
 
 PATCHURL+=(/src/mariux/patches/linux-5.10-v3-nfsd-Add-trace-events-for-all-v4-operations.patch)
 PATCHURL+=(/src/mariux/patches/linux-5.10-kernel-rcu-Print-out-more-information-when-NMI-stall.patch)
-PATCHURL+=(/src/mariux/patches/0001-md-don-t-unregister-sync_thread-with-reconfig_mutex-.patch)
+PATCHURL+=(/src/mariux/patches/linux-md-Avoid-sync_action-sync-idle-transition-deadlock.patch)
 
 #CONFIG=