cmake: KCONFIG_ROOT does not need to be set explicitly
The presence of a Kconfig file will be checked by the build system so
it is not necessary to explicitly set KCONFIG_ROOOT.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
diff --git a/boot/zephyr/CMakeLists.txt b/boot/zephyr/CMakeLists.txt
index 12dd42b..e31e531 100644
--- a/boot/zephyr/CMakeLists.txt
+++ b/boot/zephyr/CMakeLists.txt
@@ -6,8 +6,6 @@
cmake_minimum_required(VERSION 3.8.2)
-set(KCONFIG_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/Kconfig)
-
# Board-specific CONF_FILES should get merged into the build as well.
#
# Do this by defining the set_conf_file macro: