drm: Remove unused drm_device from drm_gem_object_lookup()

drm_gem_object_lookup() has never required the drm_device for its file
local translation of the user handle to the GEM object. Let's remove the
unused parameter and save some space.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: dri-devel@lists.freedesktop.org
Cc: Dave Airlie <airlied@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
[danvet: Fixup kerneldoc too.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/gma500/framebuffer.c

@@ -490,7 +490,7 @@ static struct drm_framebuffer *psb_user_framebuffer_create
 	 *	Find the GEM object and thus the gtt range object that is
 	 *	to back this space
 	 */
-	obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
+	obj = drm_gem_object_lookup(filp, cmd->handles[0]);
 	if (obj == NULL)
 		return ERR_PTR(-ENOENT);
 

drivers/gpu/drm/gma500/gem.c

@@ -63,7 +63,7 @@ int psb_gem_dumb_map_gtt(struct drm_file *file, struct drm_device *dev,
 	struct drm_gem_object *obj;
 
 	/* GEM does all our handle to object mapping */
-	obj = drm_gem_object_lookup(dev, file, handle);
+	obj = drm_gem_object_lookup(file, handle);
 	if (obj == NULL)
 		return -ENOENT;
 

drivers/gpu/drm/gma500/gma_display.c

@@ -372,7 +372,7 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
 		return -EINVAL;
 	}
 
-	obj = drm_gem_object_lookup(dev, file_priv, handle);
+	obj = drm_gem_object_lookup(file_priv, handle);
 	if (!obj) {
 		ret = -ENOENT;
 		goto unlock;