rxrpc: Break MTU determination from ICMP into its own function

Break MTU determination from ICMP out into its own function to reduce the
complexity of the error report handler.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2016-04-04 14:00:33 +01:00
commit 1a70c05bad