enetc: fix bitfields, we are clearing wrong bits

[Pavel Machek]

Bitfield manipulation in enetc_mac_config() looks wrong. Fix
it. Untested.

Signed-off-by: Pavel Machek (CIP) <pavel@xxxxxxx>

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
index 224fc37a6757..b85079493933 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
@@ -505,7 +505,7 @@ static void enetc_mac_config(struct enetc_hw *hw, phy_interface_t phy_mode)
 	if (phy_interface_mode_is_rgmii(phy_mode)) {
 		val = enetc_port_rd(hw, ENETC_PM0_IF_MODE);
 		val &= ~ENETC_PM0_IFM_EN_AUTO;
-		val &= ENETC_PM0_IFM_IFMODE_MASK;
+		val &= ~ENETC_PM0_IFM_IFMODE_MASK;
 		val |= ENETC_PM0_IFM_IFMODE_GMII | ENETC_PM0_IFM_RG;
 		enetc_port_wr(hw, ENETC_PM0_IF_MODE, val);
 	}

-- 
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