drm: ci: Use scripts/config to enable/disable configs

Instead of modifying files in git to enable/disable
configs, use scripts/config on the .config file which
will be used for building the kernel.
Acked-by: Helen Koike <helen.koike@collabora.com>
Suggested-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Vignesh Raman <vignesh.raman@collabora.com>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231207091831.660054-6-vignesh.raman@collabora.com

drivers/gpu/drm/ci/build.sh

@@ -75,19 +75,19 @@ else
     fi
 fi
 
-for opt in $ENABLE_KCONFIGS; do
-  echo CONFIG_$opt=y >> drivers/gpu/drm/ci/${KERNEL_ARCH}.config
-done
-for opt in $DISABLE_KCONFIGS; do
-  echo CONFIG_$opt=n >> drivers/gpu/drm/ci/${KERNEL_ARCH}.config
-done
-
 if [[ -n "${MERGE_FRAGMENT}" ]]; then
     ./scripts/kconfig/merge_config.sh ${DEFCONFIG} drivers/gpu/drm/ci/${MERGE_FRAGMENT}
 else
     make `basename ${DEFCONFIG}`
 fi
 
+for opt in $ENABLE_KCONFIGS; do
+    ./scripts/config --enable CONFIG_$opt
+done
+for opt in $DISABLE_KCONFIGS; do
+    ./scripts/config --disable CONFIG_$opt
+done
+
 make ${KERNEL_IMAGE_NAME}
 
 mkdir -p /lava-files/