drm/radeon|amdgpu: Remove redundant num_connectors check

The list walk will shortcircuit anyway.

Cc: Alex Deucher <alexdeucher@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161213230814.19598-4-daniel.vetter@ffwll.ch

drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c

@@ -61,10 +61,8 @@ static void amdgpu_hotplug_work_func(struct work_struct *work)
 	struct drm_connector *connector;
 
 	mutex_lock(&mode_config->mutex);
-	if (mode_config->num_connector) {
 	list_for_each_entry(connector, &mode_config->connector_list, head)
 		amdgpu_connector_hotplug(connector);
-	}
 	mutex_unlock(&mode_config->mutex);
 	/* Just fire off a uevent and let userspace tell us what to do */
 	drm_helper_hpd_irq_event(dev);

drivers/gpu/drm/radeon/radeon_irq_kms.c

@@ -85,10 +85,8 @@ static void radeon_hotplug_work_func(struct work_struct *work)
 		return;
 
 	mutex_lock(&mode_config->mutex);
-	if (mode_config->num_connector) {
 	list_for_each_entry(connector, &mode_config->connector_list, head)
 		radeon_connector_hotplug(connector);
-	}
 	mutex_unlock(&mode_config->mutex);
 	/* Just fire off a uevent and let userspace tell us what to do */
 	drm_helper_hpd_irq_event(dev);
@@ -103,10 +101,8 @@ static void radeon_dp_work_func(struct work_struct *work)
 	struct drm_connector *connector;
 
 	/* this should take a mutex */
-	if (mode_config->num_connector) {
 	list_for_each_entry(connector, &mode_config->connector_list, head)
 		radeon_connector_hotplug(connector);
-	}
 }
 /**
  * radeon_driver_irq_preinstall_kms - drm irq preinstall callback