net: dsa: sja1105: remove debugging code in sja1105_vl_gate

This shouldn't be there.

Fixes: 834f8933

 ("net: dsa: sja1105: implement tc-gate using time-triggered virtual links")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>