drm/xe/display: fix compat IS_DISPLAY_STEP() range end

It's supposed to be an open range at the end like in i915. Fingers
crossed that nobody relies on this definition.

Fixes: 44e69495 ("drm/xe/display: Implement display support")
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/fe8743770694e429f6902491cdb306c97bdf701a.1724180287.git.jani.nikula@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit 453afb1a)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/compat-i915-headers/i915_drv.h

@@ -83,7 +83,7 @@ static inline struct drm_i915_private *kdev_to_i915(struct device *kdev)
 #define HAS_GMD_ID(xe) GRAPHICS_VERx100(xe) >= 1270
 
 /* Workarounds not handled yet */
-#define IS_DISPLAY_STEP(xe, first, last) ({u8 __step = (xe)->info.step.display; first <= __step && __step <= last; })
+#define IS_DISPLAY_STEP(xe, first, last) ({u8 __step = (xe)->info.step.display; first <= __step && __step < last; })
 
 #define IS_LP(xe) (0)
 #define IS_GEN9_LP(xe) (0)