qualcommax: pcs: qca-uniphy: drop kernel version checks

Remove kernel version comparison directives from the QCA UNIPHY PCS
driver since the qualcommax targets have been updated to kernel 6.18.

Signed-off-by: George Moussalem <george.moussalem@outlook.com>
Link: https://github.com/openwrt/openwrt/pull/24973
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

target/linux/qualcommax/files/drivers/net/pcs/pcs-qca-uniphy.c

@@ -432,9 +432,7 @@ static void qca_uniphy_pcs_get_state_10base_r(struct qca_uniphy *uniphy,
 }
 
 static void qca_uniphy_pcs_get_state(struct phylink_pcs *pcs,
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 18, 0)
 				     unsigned int neg_mode,
-#endif
 				     struct phylink_link_state *state)
 {
 	struct qca_uniphy_pcs *upcs = to_qca_uniphy_pcs(pcs);
@@ -1099,9 +1097,6 @@ static int qca_uniphy_probe(struct platform_device *pdev)
 
 	for (i = 0; i < QCA_UNIPHY_CHANNELS; i++) {
 		uniphy->port_pcs[i].pcs.ops = &qca_uniphy_pcs_ops;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 18, 0)
-		uniphy->port_pcs[i].pcs.neg_mode = true;
-#endif
 		uniphy->port_pcs[i].pcs.poll = true;
 		uniphy->port_pcs[i].uniphy = uniphy;
 		uniphy->port_pcs[i].channel = i;