mlxsw: spectrum_dpipe: Fix incorrect entry index

mlxsw: spectrum_dpipe: Fix incorrect entry index

In case of disabled counters the entry index will be incorrect. Fix this
by moving the entry index set before the counter status check.

Fixes: 929d7595145a ("mlxsw: spectrum: Add Support for erif table entries access")
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>