LU-12678 lnet: discard struct ksock_peer

LU-12678 lnet: discard struct ksock_peer

struct ksock_peer is declared in a forward-ref, but
never defined or used.  Let's remove it, and change
some spaces to TABs while we are there.

Test-Parameters: trivial testlist=sanity-lnet

Signed-off-by: Mr NeilBrown <neilb@suse.com>
Change-Id: I8a86a77a5cad606a374e60a5b8920be28308587d
Reviewed-on: https://review.whamcloud.com/36835
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>