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/meesc_defconfig b/configs/meesc_defconfig
index 3546e13..03b4b5e 100644
--- a/configs/meesc_defconfig
+++ b/configs/meesc_defconfig
@@ -8,6 +8,7 @@
 CONFIG_FIT=y
 CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9263,SYS_USE_NANDFLASH"
 CONFIG_BOOTDELAY=3
+CONFIG_MISC_INIT_R=y
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_BDI is not set