net: ethernet: eth.c: removed checkpatch warnings and errors

removed these checkpatch.pl warnings:
net/ethernet/eth.c:61: WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h>
net/ethernet/eth.c:136: WARNING: Prefer netdev_dbg(netdev, ... then dev_dbg(dev, ... then pr_debug(...  to printk(KERN_DEBUG ...
net/ethernet/eth.c:181: ERROR: space prohibited before that close parenthesis ')'

Signed-off-by: Avinash Kumar <avi.kp.137@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>