[PATCH] kill eth_io_copy_and_sum()

On all targets that sucker boils down to memcpy_fromio(sbk->data, from, len).
The function name is highly misguiding (it _never_ does any checksums), the
last argument is just a noise and simply expanding the call to memcpy_fromio()
gives shorter and more readable source.  For a lot of reasons it has almost
no remaining users, so it's better to just outright kill it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/asm-mips/io.h

@@ -555,12 +555,6 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
  */
 #define __ISA_IO_base ((char *)(isa_slot_offset))
 
-/*
- * We don't have csum_partial_copy_fromio() yet, so we cheat here and
- * just copy it. The net code will then do the checksum later.
- */
-#define eth_io_copy_and_sum(skb,src,len,unused) memcpy_fromio((skb)->data,(src),(len))
-
 /*
  * The caches on some architectures aren't dma-coherent and have need to
  * handle this in software.  There are three types of operations that