bnx2x: Fix 20G KR2 support claims

Don't claim 20G is supported if the speed is unsupported by the phys
(reflected by various ethtools and ndos).
Signed-off-by: NYaniv Rosner <yanivr@broadcom.com>
Signed-off-by: NYuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: NEilon Greenstein <eilong@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c

@@ -10558,6 +10558,10 @@ static void bnx2x_link_settings_supported(struct bnx2x *bp, u32 switch_cfg)
 		if (!(bp->link_params.speed_cap_mask[idx] &
 					PORT_HW_CFG_SPEED_CAPABILITY_D0_10G))
 			bp->port.supported[idx] &= ~SUPPORTED_10000baseT_Full;
+
+		if (!(bp->link_params.speed_cap_mask[idx] &
+					PORT_HW_CFG_SPEED_CAPABILITY_D0_20G))
+			bp->port.supported[idx] &= ~SUPPORTED_20000baseKR2_Full;
 	}
 
 	BNX2X_DEV_INFO("supported 0x%x 0x%x\n", bp->port.supported[0],