net: stmmac: gmac5+: Fix missing return

If FPE is supposed to be disabled we need to return after disabling it.

Fixes: 7c72827468 ("net: stmmac: gmac5+: Add support for Frame Preemption")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/dwmac5.c

@@ -657,6 +657,7 @@ void dwmac5_fpe_configure(void __iomem *ioaddr, u32 num_txq, u32 num_rxq,
 		value &= ~EFPE;
 
 		writel(value, ioaddr + MAC_FPE_CTRL_STS);
+		return;
 	}
 
 	value = readl(ioaddr + GMAC_RXQ_CTRL1);