Update config.{guess,sub} unconditionally

Remove the BR2_UPDATE_CONFIG option which allowed to globally
enable/disable the replacement of config.{guess,sub} for
autotools-based packages. Doing it unconditionnally just works.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Config.in

@@ -327,8 +327,6 @@ config BR2_HAVE_DEVFILES
 	  Install headers and static libraries in the
 	  target filesystem
 
-source package/gnuconfig/Config.in
-
 endmenu
 
 source "toolchain/Config.in"

package/Makefile.autotools.in

@@ -128,9 +128,7 @@ define UPDATE_CONFIG_HOOK
 	done
 endef
 
-ifeq ($(BR2_UPDATE_CONFIG),y)
 $(2)_POST_PATCH_HOOKS += UPDATE_CONFIG_HOOK
-endif
 
 #
 # Hook to patch libtool to make it work properly for cross-compilation

package/gnuconfig/Config.in

@@ -1,8 +0,0 @@
-config BR2_UPDATE_CONFIG
-	bool "update config.sub and config.guess"
-	default y
-	help
-		This just exists to easily update the config.sub / config.guess
-		files in packages to the latest version (since many bundled ones
-		don't support the latest possible targets)
-