net: dsa: Utilize dsa_slave_dev_check()

Instead of open coding the check.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2017-09-19 18:00:37 -07:00 • committed by David S. Miller
commit 53bade8a33