kconfig: add CONFIG_LOCALVERSION and CONFIG_LOCALVERSION_AUTO

Copy Kconfig options from "init/Kconfig" of Linux v3.16 tag
and adjust some parts of the help document.

Move CONFIG_SPL, CONFIG_TPL, ... etc. to "Boot images" menu.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

Kconfig

@@ -14,6 +14,42 @@ config KCONFIG_OBJDIR
 
 menu "General setup"
 
+config LOCALVERSION
+	string "Local version - append to U-Boot release"
+	depends on !SPL_BUILD
+	help
+	  Append an extra string to the end of your U-Boot version.
+	  This will show up on your boot log, for example.
+	  The string you set here will be appended after the contents of
+	  any files with a filename matching localversion* in your
+	  object and source tree, in that order.  Your total string can
+	  be a maximum of 64 characters.
+
+config LOCALVERSION_AUTO
+	bool "Automatically append version information to the version string"
+	depends on !SPL_BUILD
+	default y
+	help
+	  This will try to automatically determine if the current tree is a
+	  release tree by looking for git tags that belong to the current
+	  top of tree revision.
+
+	  A string of the format -gxxxxxxxx will be added to the localversion
+	  if a git-based tree is found.  The string generated by this will be
+	  appended after any matching localversion* files, and after the value
+	  set in CONFIG_LOCALVERSION.
+
+	  (The actual string used here is the first eight characters produced
+	  by running the command:
+
+	    $ git rev-parse --verify HEAD
+
+	  which is done within the script "scripts/setlocalversion".)
+
+endmenu		# General setup
+
+menu "Boot images"
+
 config SPL_BUILD
 	bool
 	depends on $KCONFIG_OBJDIR="spl" || $KCONFIG_OBJDIR="tpl"
@@ -54,6 +90,6 @@ config SYS_EXTRA_OPTIONS
 	  configuration to Kconfig. Since this option will be removed sometime,
 	  new boards should not use this option.
 
-endmenu		# General setup
+endmenu		# Boot images
 
 source "arch/Kconfig"