Fix allyesconfig build on architectures without IOMEM:
drivers/net/ethernet/calxeda/xgmac.c:1800:2:
  error: implicit declaration of function 'iounmap' [-Werror=implicit-function-declaration]
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 config NET_CALXEDA_XGMAC
        tristate "Calxeda 1G/10G XGMAC Ethernet driver"
-
+       depends on HAS_IOMEM
        select CRC32
        help
          This is the driver for the XGMAC Ethernet IP block found on Calxeda