drm/i915: Suspend the framebuffer console during driver shutdown

Suspend the FB console during driver shutdown the same way this is done
during system resume. This should prevent any HPD event to trigger a new
FB probe/modeset cycle happening in parallel with the display HW
disable/uninitialize steps.

A preceding FB HPD event handling may be still pending, resulting in a
probe/modeset like the above, these will be prevented by a later change
in this patchset.

Link: https://patchwork.freedesktop.org/patch/msgid/20240104083008.2715733-6-imre.deak@intel.com
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>

drivers/gpu/drm/i915/i915_driver.c

@@ -1002,6 +1002,7 @@ void i915_driver_shutdown(struct drm_i915_private *i915)
 	intel_runtime_pm_disable(&i915->runtime_pm);
 	intel_power_domains_disable(i915);
 
+	intel_fbdev_set_suspend(&i915->drm, FBINFO_STATE_SUSPENDED, true);
 	if (HAS_DISPLAY(i915)) {
 		drm_kms_helper_poll_disable(&i915->drm);