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/mga_state.c b/drivers/char/drm/mga_state.c
index 4e98671..7481172 100644
--- a/drivers/char/drm/mga_state.c
+++ b/drivers/char/drm/mga_state.c
@@ -835,7 +835,7 @@
 	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 	drm_mga_clear_t clear;
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	DRM_COPY_FROM_USER_IOCTL(clear, (drm_mga_clear_t __user *) data,
 				 sizeof(clear));
@@ -860,7 +860,7 @@
 	drm_mga_private_t *dev_priv = dev->dev_private;
 	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	if (sarea_priv->nbox > MGA_NR_SAREA_CLIPRECTS)
 		sarea_priv->nbox = MGA_NR_SAREA_CLIPRECTS;
@@ -885,7 +885,7 @@
 	drm_mga_buf_priv_t *buf_priv;
 	drm_mga_vertex_t vertex;
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	DRM_COPY_FROM_USER_IOCTL(vertex,
 				 (drm_mga_vertex_t __user *) data,
@@ -925,7 +925,7 @@
 	drm_mga_buf_priv_t *buf_priv;
 	drm_mga_indices_t indices;
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	DRM_COPY_FROM_USER_IOCTL(indices,
 				 (drm_mga_indices_t __user *) data,
@@ -966,7 +966,7 @@
 	drm_mga_iload_t iload;
 	DRM_DEBUG("\n");
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	DRM_COPY_FROM_USER_IOCTL(iload, (drm_mga_iload_t __user *) data,
 				 sizeof(iload));
@@ -1008,7 +1008,7 @@
 	drm_mga_blit_t blit;
 	DRM_DEBUG("\n");
 
-	LOCK_TEST_WITH_RETURN(dev, filp);
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
 
 	DRM_COPY_FROM_USER_IOCTL(blit, (drm_mga_blit_t __user *) data,
 				 sizeof(blit));