drm/i915: Add DEBUG_GEM to the recommended CI config

Now that i915 compiles cleanly with Werror, we can enforce enabling
DEBUG_GEM when selecting the default debug config.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@intel.com>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210114113434.8229-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/Kconfig.debug

@@ -31,10 +31,12 @@ config DRM_I915_DEBUG
 	select DRM_DEBUG_SELFTEST
 	select DMABUF_SELFTESTS
 	select SW_SYNC # signaling validation framework (igt/syncobj*)
+	select DRM_I915_WERROR
+	select DRM_I915_DEBUG_GEM
+	select DRM_I915_DEBUG_MMIO
+	select DRM_I915_DEBUG_RUNTIME_PM
 	select DRM_I915_SW_FENCE_DEBUG_OBJECTS
 	select DRM_I915_SELFTEST
-	select DRM_I915_DEBUG_RUNTIME_PM
-	select DRM_I915_DEBUG_MMIO
 	default n
 	help
 	  Choose this option to turn on extra driver debugging that may affect