qed: Prevent warning without CONFIG_RFS_ACCEL

After removing the PTP related initialization from slowpath start,
the remaining PTT entry is required only in case CONFIG_RFS_ACCEL is set.
Otherwise, it leads to a warning due to it being unused.

Fixes: d179bd16 ("qed: Acquire/release ptt_ptp lock when enabling/disabling PTP")
Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed_main.c

@@ -928,7 +928,9 @@ static int qed_slowpath_start(struct qed_dev *cdev,
 	struct qed_tunnel_info tunn_info;
 	const u8 *data = NULL;
 	struct qed_hwfn *hwfn;
+#ifdef CONFIG_RFS_ACCEL
 	struct qed_ptt *p_ptt;
+#endif
 	int rc = -EINVAL;
 
 	if (qed_iov_wq_start(cdev))