MAC_ECOLL
writel(0, gp->regs + MAC_ECOLL);
dev->stats.tx_aborted_errors += readl(gp->regs + MAC_ECOLL);
(readl(gp->regs + MAC_ECOLL) + readl(gp->regs + MAC_LCOLL));
writel(0, gp->regs + MAC_ECOLL);