drm: Replace filp in ioctl arguments with drm_file *file_priv.

As a fallout, replace filp storage with file_priv storage for "unique
identifier of a client" all over the DRM.  There is a 1:1 mapping, so this
should be a noop.  This could be a minor performance improvement, as everyth
on Linux dereferenced filp to get file_priv anyway, while only the mmap ioct
went the other direction.

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/i915_dma.c b/drivers/char/drm/i915_dma.c
index a7566ff..25d8b2b 100644
--- a/drivers/char/drm/i915_dma.c
+++ b/drivers/char/drm/i915_dma.c
@@ -602,7 +602,7 @@
 {
 	DRM_DEVICE;
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	return i915_quiescent(dev);
 }
@@ -628,7 +628,7 @@
 	DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
 		  batch.start, batch.used, batch.num_cliprects);
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	if (batch.num_cliprects && DRM_VERIFYAREA_READ(batch.cliprects,
 						       batch.num_cliprects *
@@ -657,7 +657,7 @@
 	DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 		  cmdbuf.buf, cmdbuf.sz, cmdbuf.num_cliprects);
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	if (cmdbuf.num_cliprects &&
 	    DRM_VERIFYAREA_READ(cmdbuf.cliprects,
@@ -683,7 +683,7 @@
 
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	return i915_dispatch_flip(dev);
 }
@@ -821,11 +821,11 @@
 	i915_dma_cleanup(dev);
 }
 
-void i915_driver_preclose(struct drm_device * dev, DRMFILE filp)
+void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
 {
 	if (dev->dev_private) {
 		drm_i915_private_t *dev_priv = dev->dev_private;
-		i915_mem_release(dev, filp, dev_priv->agp_heap);
+		i915_mem_release(dev, file_priv, dev_priv->agp_heap);
 	}
 }