kconfig: unset IKCONFIG_PROC and clean up nesting

Due to cut and paste error IKCONFIG was both set and cleared.
It was suppose to be IKCONFIG_PROC to be cleared.

Also cleaned up if nesting.

Reported-by: Alan Jenkins <sourcejedi.lkml@googlemail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>