net: Add SMC911X driver to Kconfig, convert

We add the various SMC91XX symbols to drivers/net/Kconfig and then this
converts the following to Kconfig:
   CONFIG_SMC911X
   CONFIG_SMC911X_BASE
   CONFIG_SMC911X_16_BIT
   CONFIG_SMC911X_32_BIT

Signed-off-by: Adam Ford <aford173@gmail.com>
[trini: Apply to the rest of the tree, re-squash old and new patch]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/duovero_defconfig b/configs/duovero_defconfig
index feec2cf..b76da3e 100644
--- a/configs/duovero_defconfig
+++ b/configs/duovero_defconfig
@@ -23,6 +23,10 @@
 # CONFIG_SPL_EFI_PARTITION is not set
 CONFIG_SPL_PARTITION_UUIDS=y
 CONFIG_MMC_OMAP_HS=y
+CONFIG_NETDEVICES=y
+CONFIG_SMC911X=y
+CONFIG_SMC911X_BASE=0x2C000000
+CONFIG_SMC911X_32_BIT=y
 CONFIG_SYS_NS16550=y
 CONFIG_OMAP3_SPI=y
 CONFIG_USB=y