3c5xx: convert printk() to pr_<foo>()

Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/3c515.c
Simple merge

diff --cc drivers/net/3c523.c
Simple merge

diff --cc drivers/net/3c527.c
Simple merge

diff --cc drivers/net/3c59x.c
Simple merge