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/MCR3000_defconfig b/configs/MCR3000_defconfig
index a75d68c..f8e4a47 100644
--- a/configs/MCR3000_defconfig
+++ b/configs/MCR3000_defconfig
@@ -41,6 +41,7 @@
 CONFIG_BOOTDELAY=5
 CONFIG_USE_BOOTCOMMAND=y
 CONFIG_BOOTCOMMAND="run flashboot"
+CONFIG_MISC_INIT_R=y
 CONFIG_HUSH_PARSER=y
 # CONFIG_AUTO_COMPLETE is not set
 CONFIG_SYS_PROMPT="S3K> "
@@ -65,7 +66,6 @@
 CONFIG_ENV_IS_IN_FLASH=y
 # CONFIG_MMC is not set
 CONFIG_MTD_NOR_FLASH=y
-CONFIG_NETDEVICES=y
 CONFIG_MPC8XX_FEC=y
 # CONFIG_PCI is not set
 CONFIG_SHA256=y