iommufd: Reorder struct forward declarations

Reorder struct forward declarations to alphabetic order to simplify
maintenance, as upcoming patches will add more to the list.

No functional change intended.

Link: https://patch.msgid.link/r/c5dd87100f6f01389b838c63237e28c5dd373358.1724776335.git.nicolinc@nvidia.com
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

Author: nicolinc

include/linux/iommufd.h

@@ -11,12 +11,12 @@
 #include <linux/types.h>
 
 struct device;
-struct iommufd_device;
-struct page;
-struct iommufd_ctx;
-struct iommufd_access;
 struct file;
 struct iommu_group;
+struct iommufd_access;
+struct iommufd_ctx;
+struct iommufd_device;
+struct page;
 
 struct iommufd_device *iommufd_device_bind(struct iommufd_ctx *ictx,
 					   struct device *dev, u32 *id);