Fix usage of zed_log_msg() and zfs_panic_recover()

Coverity complained about the format specifiers not matching variables.
In one case, the variable is a constant, so we fix it. In another, we
were missing an argument (about which coverity also complained).

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13888

module/zfs/spa_checkpoint.c

@@ -347,7 +347,7 @@ spa_checkpoint_discard_thread_sync(void *arg, dmu_tx_t *tx)
 		if (error != 0) {
 			zfs_panic_recover("zfs: error %lld was returned "
 			    "while incrementally destroying the checkpoint "
-			    "space map of vdev %u\n",
+			    "space map of vdev %llu\n",
 			    (longlong_t)error, vd->vdev_id);
 		}
 		ASSERT0(words_after);