Avoid logging after final dirty txg is set

This should avoid this VERIFY trip:

VERIFY3(tx->tx_txg <= spa_final_dirty_txg(os->os_spa)) failed (63 <= 62
PANIC at dbuf.c:2324:dbuf_dirty()
Showing stack for process 587858
CPU: 1 PID: 587858 Comm: txg_sync Tainted: P           OE      6.10.12-
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-
Call Trace:
 <TASK>
 dump_stack_lvl+0x64/0x80
 spl_panic+0x100/0x120 [spl]
 dbuf_dirty+0xd5a/0x1300 [zfs]
 ? srso_alias_return_thunk+0x5/0xfbef5
 ? dmu_buf_will_dirty_impl+0xdf/0x330 [zfs]
 spa_history_log_sync+0x11e/0x620 [zfs]
 ? srso_alias_return_thunk+0x5/0xfbef5
 ? list_head+0x9/0x30 [zfs]
 ? srso_alias_return_thunk+0x5/0xfbef5
 ? srso_alias_return_thunk+0x5/0xfbef5
 ? __cv_destroy+0x92/0x250 [spl]
 ? srso_alias_return_thunk+0x5/0xfbef5
 ? mutex_lock+0x12/0x30
 dsl_sync_task_sync+0xb9/0x120 [zfs]
 dsl_pool_sync+0x4c7/0x6a0 [zfs]
 spa_sync_iterate_to_convergence+0xd8/0x320 [zfs]
 spa_sync+0x308/0x8e0 [zfs]
 ? __wake_up+0x44/0x60
 txg_sync_thread+0x272/0x3c0 [zfs]
 ? __pfx_txg_sync_thread+0x10/0x10 [zfs]
 ? __pfx_thread_generic_wrapper+0x10/0x10 [spl]
 thread_generic_wrapper+0x66/0x90 [spl]
 kthread+0xd2/0x100
 ? __pfx_kthread+0x10/0x10
 ret_from_fork+0x34/0x50
 ? __pfx_kthread+0x10/0x10
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Signed-off-by: Pavel Snajdr <snajpa@snajpa.net>

module/zfs/spa_history.c

@@ -560,6 +560,9 @@ spa_history_log_internal(spa_t *spa, const char *operation,
 		}
 	}
 
+	if (tx->tx_txg > spa_final_dirty_txg(spa))
+		return;
+
 	va_start(adx, fmt);
 	log_internal(fnvlist_alloc(), operation, spa, htx, fmt, adx);
 	va_end(adx);