kconfig: add symbol option config syntax

This adds the general framework to the parser to define options for config
symbols with a syntax like:

config FOO
	option bar[="arg"]

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/kconfig/zconf.gperf b/scripts/kconfig/zconf.gperf
index b032206..9b44c80 100644
--- a/scripts/kconfig/zconf.gperf
+++ b/scripts/kconfig/zconf.gperf
@@ -39,5 +39,8 @@
 select,		T_SELECT,	TF_COMMAND
 enable,		T_SELECT,	TF_COMMAND
 range,		T_RANGE,	TF_COMMAND
+option,		T_OPTION,	TF_COMMAND
 on,		T_ON,		TF_PARAM
+modules,	T_OPT_MODULES,	TF_OPTION
+defconfig_list,	T_OPT_DEFCONFIG_LIST,TF_OPTION
 %%