fib: fix typos in doxygen
fib: fix typos in doxygen

cleaned up some trivial typo's while reading through adj.h

Type: docs

Change-Id: I1b6cd815dc10ed3da8db2024b3e015e076235d50
Signed-off-by: Paul Vinciguerra <b92f79aabe4c9c18085c7347110a52af0898a0ef@vinciconsulting.com>

chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp