init/config: Do not select BUILD_BIN2C for IKCONFIG

Since commit 13610aa9 ("kernel/configs: use .incbin directive to
embed config_data.gz"), IKCONFIG no longer uses BUILD_BIN2C so prevent
it from being selected in Kconfig.
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NJoel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

init/Kconfig

@@ -562,7 +562,6 @@ config BUILD_BIN2C
 
 config IKCONFIG
 	tristate "Kernel .config support"
-	select BUILD_BIN2C
 	---help---
 	  This option enables the complete Linux kernel ".config" file
 	  contents to be saved in the kernel. It provides documentation