drm/i915: use pointer = k[cmz...]alloc(sizeof(*pointer), ...) pattern

Done while reviewing all our allocations for fubar. Also a few errant
cases of lacking () for the sizeof operator - just a bit of OCD.

I've left out all the conversions that also should use kcalloc from
this patch  (it's only 2).

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 512645f..aa69c73 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -641,7 +641,7 @@
 
 	if (batch->num_cliprects) {
 		cliprects = kcalloc(batch->num_cliprects,
-				    sizeof(struct drm_clip_rect),
+				    sizeof(*cliprects),
 				    GFP_KERNEL);
 		if (cliprects == NULL)
 			return -ENOMEM;
@@ -703,7 +703,7 @@
 
 	if (cmdbuf->num_cliprects) {
 		cliprects = kcalloc(cmdbuf->num_cliprects,
-				    sizeof(struct drm_clip_rect), GFP_KERNEL);
+				    sizeof(*cliprects), GFP_KERNEL);
 		if (cliprects == NULL) {
 			ret = -ENOMEM;
 			goto fail_batch_free;
@@ -1480,7 +1480,7 @@
 	dev->types[8] = _DRM_STAT_SECONDARY;
 	dev->types[9] = _DRM_STAT_DMA;
 
-	dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
+	dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
 	if (dev_priv == NULL)
 		return -ENOMEM;