net: Move CONFIG_E1000 options to Kconfig

Move config for the E1000 Ethernet driver to Kconfig and tidy up affected
boards.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/crownbay_defconfig b/configs/crownbay_defconfig
index aa1232d..4fc1827 100644
--- a/configs/crownbay_defconfig
+++ b/configs/crownbay_defconfig
@@ -19,6 +19,8 @@
 CONFIG_CPU=y
 CONFIG_DM_PCI=y
 CONFIG_SPI_FLASH=y
+CONFIG_NETDEVICES=y
+CONFIG_E1000=y
 CONFIG_VIDEO_VESA=y
 CONFIG_FRAMEBUFFER_SET_VESA_MODE=y
 CONFIG_DM_RTC=y