staging/lustre/socklnd: Fix whitespace problem

checkpatch highlighted there are 8 spaces that could be converted to a tab:
ERROR: code indent should use tabs where possible
+^I^I^I^I^I         */$
Signed-off-by: NOleg Drokin <green@linuxhacker.ru>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>