Convert CONFIG_E1000 to Kconfig

This converts the following to Kconfig:
   CONFIG_E1000

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/mvebu_crb_cn9130_defconfig b/configs/mvebu_crb_cn9130_defconfig
index 334d7f2..039fd8b 100644
--- a/configs/mvebu_crb_cn9130_defconfig
+++ b/configs/mvebu_crb_cn9130_defconfig
@@ -60,6 +60,7 @@
 CONFIG_SPI_FLASH_MTD=y
 CONFIG_PHY_MARVELL=y
 CONFIG_PHY_GIGE=y
+CONFIG_E1000=y
 CONFIG_MVPP2=y
 CONFIG_NVME=y
 CONFIG_PCI=y