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/MPC8313ERDB_NAND_33_defconfig b/configs/MPC8313ERDB_NAND_33_defconfig
index 08587b7..141ecb8 100644
--- a/configs/MPC8313ERDB_NAND_33_defconfig
+++ b/configs/MPC8313ERDB_NAND_33_defconfig
@@ -8,6 +8,7 @@
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_SYS_EXTRA_OPTIONS="SYS_33MHZ"
 CONFIG_BOOTDELAY=6
+CONFIG_MISC_INIT_R=y
 CONFIG_BOARD_EARLY_INIT_R=y
 # CONFIG_SPL_FRAMEWORK is not set
 CONFIG_SPL_NAND_SUPPORT=y
@@ -31,7 +32,6 @@
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_NAND=y
 CONFIG_PHY_MARVELL=y
-CONFIG_NETDEVICES=y
 CONFIG_TSEC_ENET=y
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y