drm/xe: move xe_display.[ch] under display/

All the other display related files are under display/ subdirectory,
also move xe_display.[ch] there.

Sort the build list while at it.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240122101428.2683468-1-jani.nikula@intel.com

drivers/gpu/drm/xe/Makefile

@@ -185,17 +185,17 @@ $(obj)/i915-display/%.o: $(srctree)/drivers/gpu/drm/i915/display/%.c FORCE
 
 # Display code specific to xe
 xe-$(CONFIG_DRM_XE_DISPLAY) += \
-	xe_display.o \
-	display/xe_fb_pin.o \
-	display/xe_hdcp_gsc.o \
-	display/xe_plane_initial.o \
-	display/xe_display_rps.o \
+	display/ext/i915_irq.o \
+	display/ext/i915_utils.o \
+	display/intel_fb_bo.o \
+	display/intel_fbdev_fb.o \
+	display/xe_display.o \
 	display/xe_display_misc.o \
+	display/xe_display_rps.o \
 	display/xe_dsb_buffer.o \
-	display/intel_fbdev_fb.o \
-	display/intel_fb_bo.o \
-	display/ext/i915_irq.o \
-	display/ext/i915_utils.o
+	display/xe_fb_pin.o \
+	display/xe_hdcp_gsc.o \
+	display/xe_plane_initial.o
 
 # SOC code shared with i915
 xe-$(CONFIG_DRM_XE_DISPLAY) += \