net: e1000: Add Kconfig options

Add Kconfig options in preparation for moving boards to use Kconfig.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index ce76a02..7367d9e 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -20,6 +20,38 @@
 
 if NETDEVICES
 
+config E1000
+	bool "Intel PRO/1000 Gigabit Ethernet support"
+	help
+	  This driver supports Intel(R) PRO/1000 gigabit ethernet family of
+	  adapters.  For more information on how to identify your adapter, go
+	  to the Adapter & Driver ID Guide at:
+
+	  <http://support.intel.com/support/network/adapter/pro100/21397.htm>
+
+config E1000_SPI_GENERIC
+	bool "Allow access to the Intel 8257x SPI bus"
+	depends on E1000
+	help
+	  Allow generic access to the SPI bus on the Intel 8257x, for
+	  example with the "sspi" command.
+
+config E1000_SPI
+	bool "Enable SPI bus utility code"
+	depends on E1000
+	help
+	  Utility code for direct access to the SPI bus on Intel 8257x.
+	  This does not do anything useful unless you set at least one
+	  of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC.
+
+config CMD_E1000
+	bool "Enable the e1000 command"
+	depends on E1000
+	help
+	  This enables the 'e1000' management command for E1000 devices. When
+	  used on devices with SPI support you can reprogram the EEPROM from
+	  U-Boot.
+
 config ETH_SANDBOX
 	depends on DM_ETH && SANDBOX
 	default y