Convert CONFIG_MISC_INIT_R to Kconfig

This converts the following to Kconfig:
   CONFIG_MISC_INIT_R

Signed-off-by: Adam Ford <aford173@gmail.com>
[trini: Update the defaults logic slightly]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/odroid-xu3_defconfig b/configs/odroid-xu3_defconfig
index ffd8e0e..d141658 100644
--- a/configs/odroid-xu3_defconfig
+++ b/configs/odroid-xu3_defconfig
@@ -11,6 +11,7 @@
 CONFIG_FIT_BEST_MATCH=y
 CONFIG_SILENT_CONSOLE=y
 CONFIG_CONSOLE_MUX=y
+CONFIG_MISC_INIT_R=y
 CONFIG_SYS_PROMPT="ODROID-XU3 # "
 CONFIG_CMD_THOR_DOWNLOAD=y
 CONFIG_CMD_DFU=y
@@ -32,7 +33,6 @@
 CONFIG_DFU_MMC=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_DW=y
-CONFIG_NETDEVICES=y
 CONFIG_SMC911X=y
 CONFIG_SMC911X_BASE=0x5000000
 CONFIG_DM_PMIC=y