net: stmmac: starfive: Add STMMAC_FLAG_SPH_DISABLE flag

Add default disable split header flag in all the starfive
soc.

Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260527084108.121416-5-minda.chen@starfivetech.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: mindachen1987

drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c

@@ -148,7 +148,7 @@ static int starfive_dwmac_probe(struct platform_device *pdev)
 			return err;
 	}
 
-	plat_dat->flags |= STMMAC_FLAG_EN_TX_LPI_CLK_PHY_CAP;
+	plat_dat->flags |= (STMMAC_FLAG_EN_TX_LPI_CLK_PHY_CAP | STMMAC_FLAG_SPH_DISABLE);
 	plat_dat->dma_cfg->dche = true;
 
 	return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);