drm/tests: Build KMS helpers when DRM_KUNIT_TEST_HELPERS is enabled

Commit 6667194 ("drm/tests: helpers: Add atomic helpers")
introduced a dependency on CRTC helpers in KUnit test helpers.
Select the former when building KUnit test helpers to avoid
linker errors.

Fixes: 6667194 ("drm/tests: helpers: Add atomic helpers")
Cc: Maxime Ripard <[email protected]>
Cc: Maíra Canal <[email protected]>
Signed-off-by: Karolina Stolarek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Maxime Ripard <[email protected]>

Author: drobnik

drivers/gpu/drm/Kconfig

@@ -68,6 +68,7 @@ config DRM_USE_DYNAMIC_DEBUG
 config DRM_KUNIT_TEST_HELPERS
 	tristate
 	depends on DRM && KUNIT
+	select DRM_KMS_HELPER
 	help
 	  KUnit Helpers for KMS drivers.
 
@@ -80,7 +81,6 @@ config DRM_KUNIT_TEST
 	select DRM_EXEC
 	select DRM_EXPORT_FOR_TESTS if m
 	select DRM_GEM_SHMEM_HELPER
-	select DRM_KMS_HELPER
 	select DRM_KUNIT_TEST_HELPERS
 	select DRM_LIB_RANDOM
 	select PRIME_NUMBERS