bnxt_en: Add warning message about disallowed speed change

Some chips may not allow changing default speed when dual rate
transceivers modules are used. Firmware on those chips will
indicate the same to the driver.

Add a warning message when speed change is not supported
because a dual rate transceiver is detected by the NIC.
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Link: https://lore.kernel.org/r/20240402093753.331120-8-pavan.chebbi@broadcom.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -2525,6 +2525,9 @@ static bool bnxt_event_error_report(struct bnxt *bp, u32 data1, u32 data2)
 		}
 		return false;
 	}
+	case ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_DUAL_DATA_RATE_NOT_SUPPORTED:
+		netdev_warn(bp->dev, "Speed change not supported with dual rate transceivers on this board\n");
+		break;
 	default:
 		netdev_err(bp->dev, "FW reported unknown error type %u\n",
 			   err_type);