radix_trie: pass fewer params to node_get

[dougm]

Summary

Let node_get calculate it's own owner value. Don't pass the count parameter, since it's always 2. Save 16 bytes in insert(). Move, without modifying, slot and trimkey to handle use-before-declaration problem.

[dougm]

This patch needs a refresh after the trimkey patch.

[markj]

sys/kern/subr_pctrie.c

101

Perhaps remove the extra newline here since you're moving this function anyway.