This patch adds {read,write}*_be big endian memory access
routines to the io.h header used on SPARC32 and SPARC64.

Tested on SPARC32 (LEON)
Signed-off-by: NJan Andersson <jan@gaisler.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>