[RFC PATCH] kconfig: use long options in conf

[Sam Ravnborg]

Hi Michal.

I cooked up the following to introduce long options in conf.
But in the process I dropped the short options. Is this OK?

Usign the same name in conf.c as used as make target really
helped the readability.

Note: Patch on top of kbuild.get for-next.

It is an RFC patch as I plan to submit a larger serie
when I get the defconfig stuff redone.
But you requested this and it was a logical first step.

	Sam