Flooding the console with error messages for every RX FIFO overrun,
checksum error and framing error isn't very sensible.  Each of these
errors can occur during normal operation, so stop printk'ing error
messages for RX errors at all.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>