devlink: Left justification on FMSG output

devlink: Left justification on FMSG output

FMSG output is dynamic, space separator must be on the left hand side of
the value. Otherwise output has redundant left indentation regardless
the hierarchy.

Before the patch:
 Common config: SQ: stride size: 64 size: 1024
 CQ: stride size: 64 size: 1024
 SQs:
   channel ix: 0 tc: 0 txq ix: 0 sqn: 10 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 6 HW status: 0
   channel ix: 1 tc: 0 txq ix: 1 sqn: 14 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 10 HW status: 0
   channel ix: 2 tc: 0 txq ix: 2 sqn: 18 HW state: 1 stopped: false cc: 5 pc: 5 CQ: cqn: 14 HW status: 0
   channel ix: 3 tc: 0 txq ix: 3 sqn: 22 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 18 HW status: 0

With the patch:
Common config: SQ: stride size: 64 size: 1024
CQ: stride size: 64 size: 1024
SQs:
  channel ix: 0 tc: 0 txq ix: 0 sqn: 10 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 6 HW status: 0
  channel ix: 1 tc: 0 txq ix: 1 sqn: 14 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 10 HW status: 0
  channel ix: 2 tc: 0 txq ix: 2 sqn: 18 HW state: 1 stopped: false cc: 5 pc: 5 CQ: cqn: 14 HW status: 0
  channel ix: 3 tc: 0 txq ix: 3 sqn: 22 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 18 HW status: 0

Fixes: 844a61764c6f ("devlink: Add helper functions for name and value separately")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>