[FS#1170] mt7621: kernel errors - rcu_sched detected stalls on CPUs/tasks - again

[LEDE Bugs]

The following task has a new comment added:

FS#1170 - mt7621: kernel errors - rcu_sched detected stalls on CPUs/tasks - again
User who did this - Felix Fietkau (nbd)

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Should be fixed now, please test
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1170#comment4590