phy: kill useless local variables

A number of functions (especially in phy.c) has local variables that were hardly
needed in the first place -- remove them.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/phy/phy.c
Simple merge

diff --cc drivers/net/phy/phy_device.c
Simple merge