spider_net: fix compile issue introduced by driver move

Both Spider net driver and Sun GEM driver use the sungem_phy.o object.
This fix creates a Kconfig object for sungem_phy (like MDIO) so that
both drivers require the SUNGEM_PHY object.

This has been compile tested for the Sun GEM driver.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sun/Kconfig

@@ -57,6 +57,7 @@ config SUNGEM
 	tristate "Sun GEM support"
 	depends on PCI
 	select CRC32
+	select SUNGEM_PHY
 	---help---
 	  Support for the Sun GEM chip, aka Sun GigabitEthernet/P 2.0.  See also
 	  <http://www.sun.com/products-n-solutions/hardware/docs/pdf/806-3985-10.pdf>.