ptp: ocp: fix error code in probe()

There is a copy and paste error so this uses a valid pointer instead of
an error pointer.

Fixes: 09eeb3ae ("ptp_ocp: implement DPLL ops")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://lore.kernel.org/r/5c581336-0641-48bd-88f7-51984c3b1f79@moroto.mountainSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/ptp/ptp_ocp.c

@@ -4453,7 +4453,7 @@ ptp_ocp_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	for (i = 0; i < OCP_SMA_NUM; i++) {
 		bp->sma[i].dpll_pin = dpll_pin_get(clkid, i, THIS_MODULE, &bp->sma[i].dpll_prop);
 		if (IS_ERR(bp->sma[i].dpll_pin)) {
-			err = PTR_ERR(bp->dpll);
+			err = PTR_ERR(bp->sma[i].dpll_pin);
 			goto out_dpll;
 		}