kbuild: trivial - use tabs for code indent where possible

Imported from upstream linux kernel kconfig.

Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

Change-Id: Ieed948c6b9c5fc40c1f3d652df11fa70ec6e93a0
Original-Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Original-Signed-off-by: Michal Marek <mmarek@suse.cz>
Reviewed-on: http://review.coreboot.org/9308
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>

util/kconfig/conf.c

@@ -696,7 +696,7 @@ int main(int ac, char **av)
 	} else if (input_mode == savedefconfig) {
 		if (conf_write_defconfig(defconfig_file)) {
 			fprintf(stderr, _("n*** Error while saving defconfig to: %s\n\n"),
-			        defconfig_file);
+				defconfig_file);
 			return 1;
 		}
 	} else if (input_mode != listnewconfig) {