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/display5_factory_defconfig b/configs/display5_factory_defconfig
index f96e026..edb37c3 100644
--- a/configs/display5_factory_defconfig
+++ b/configs/display5_factory_defconfig
@@ -17,6 +17,7 @@
 CONFIG_USE_BOOTCOMMAND=y
 CONFIG_BOOTCOMMAND="run factory"
 CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_MISC_INIT_R=y
 # CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
 # CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR is not set
 CONFIG_SPL_DMA_SUPPORT=y