net/bnxt: fix check for autoneg enablement

[ upstream commit 7b82c4d ]

HWRM_PORT_PHY_QCFG_OUTPUT response indicates the autoneg speed mask
supported by the FW. While enabling autoneg, driver should also check
the FW advertised PAM4 speeds supported in auto mode which is set
in the HWRM_PORT_PHY_QCFG_OUTPUT response.

Fixes: c23f9de ("net/bnxt: support 200G PAM4 link")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>

drivers/net/bnxt/bnxt_hwrm.c

@@ -3145,7 +3145,8 @@ int bnxt_set_hwrm_link_config(struct bnxt *bp, bool link_up)
 					  bp->link_info->link_signal_mode);
 	link_req.phy_flags = HWRM_PORT_PHY_CFG_INPUT_FLAGS_RESET_PHY;
 	/* Autoneg can be done only when the FW allows. */
-	if (autoneg == 1 && bp->link_info->support_auto_speeds) {
+	if (autoneg == 1 &&
+	    (bp->link_info->support_auto_speeds || bp->link_info->support_pam4_auto_speeds)) {
 		link_req.phy_flags |=
 				HWRM_PORT_PHY_CFG_INPUT_FLAGS_RESTART_AUTONEG;
 		link_req.auto_link_speed_mask =