ath10k: return better errno for unsupported pdev params

Return -EOPNOTSUPP if given parameter is not supported by firmware.
Signed-off-by: Bartosz Markowski <bartosz.markowski@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/wmi.c

@@ -2119,7 +2119,7 @@ int ath10k_wmi_pdev_set_param(struct ath10k *ar, u32 id, u32 value)
 
 	if (id == WMI_PDEV_PARAM_UNSUPPORTED) {
 		ath10k_warn("pdev param %d not supported by firmware\n", id);
-		return -EINVAL;
+		return -EOPNOTSUPP;
 	}
 
 	skb = ath10k_wmi_alloc_skb(sizeof(*cmd));