drm: Link drm_rect.o into DRM core module

Several places in drm.ko use struct drm_rect and its helpers. This
only works as the called interfaces are declared as static inline in
the header file. Fix the issue by linking drm_rect.o into drm.ko.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240919185436.86790-1-tzimmermann@suse.de

drivers/gpu/drm/Makefile

@@ -68,6 +68,7 @@ drm-y := \
 	drm_prime.o \
 	drm_print.o \
 	drm_property.o \
+	drm_rect.o \
 	drm_syncobj.o \
 	drm_sysfs.o \
 	drm_trace_points.o \
@@ -140,7 +141,6 @@ drm_kms_helper-y := \
 	drm_modeset_helper.o \
 	drm_plane_helper.o \
 	drm_probe_helper.o \
-	drm_rect.o \
 	drm_self_refresh_helper.o \
 	drm_simple_kms_helper.o
 drm_kms_helper-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o