Convert CONFIG_MISC_INIT_F to Kconfig

This converts the following to Kconfig:
   CONFIG_MISC_INIT_F

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/common/Kconfig b/common/Kconfig
index 482f123..0e36dfd 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -527,6 +527,12 @@
 	  U-Boot calls last_stage_init() before the command-line interpreter is
 	  started.
 
+config MISC_INIT_F
+	bool "Execute pre-relocation misc init"
+	help
+	  Enabling this option calls the 'misc_init_f' function in the init
+	  sequence just before DRAM is inited.
+
 config MISC_INIT_R
 	bool "Execute Misc Init"
 	default y if ARCH_KEYSTONE || ARCH_SUNXI || MPC85xx