Convert CONFIG_ARCH_MISC_INIT to Kconfig

This converts the following to Kconfig:
   CONFIG_ARCH_MISC_INIT

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/galileo_defconfig b/configs/galileo_defconfig
index 7da870f..cff847a 100644
--- a/configs/galileo_defconfig
+++ b/configs/galileo_defconfig
@@ -12,6 +12,7 @@
 CONFIG_BOOTSTAGE_REPORT=y
 CONFIG_CONSOLE_MUX=y
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
+CONFIG_ARCH_MISC_INIT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_CPU=y
 # CONFIG_CMD_IMLS is not set