drm/vmwgfx: Use kmemdup instead of kmalloc and memcpy

When some other buffer is immediately copied into allocated region.
Replace calls to kmalloc followed by a memcpy with a direct
call to kmemdup.
Signed-off-by: NShyam Saini <mayhs11saini@gmail.com>
Reviewed-by: NSinclair Yeh <syeh@vmare.com>

drivers/gpu/drm/vmwgfx/vmwgfx_mob.c

@@ -319,18 +319,17 @@ int vmw_otables_setup(struct vmw_private *dev_priv)
 	int ret;
 
 	if (dev_priv->has_dx) {
-		*otables = kmalloc(sizeof(dx_tables), GFP_KERNEL);
+		*otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL);
 		if (*otables == NULL)
 			return -ENOMEM;
 
-		memcpy(*otables, dx_tables, sizeof(dx_tables));
 		dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables);
 	} else {
-		*otables = kmalloc(sizeof(pre_dx_tables), GFP_KERNEL);
+		*otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables),
+				   GFP_KERNEL);
 		if (*otables == NULL)
 			return -ENOMEM;
 
-		memcpy(*otables, pre_dx_tables, sizeof(pre_dx_tables));
 		dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables);
 	}