vfio: correct kdoc for ops structures

Address minor omissions from kdoc for ops structures flagged by check-kdoc:

  ./scripts/kernel-doc -Werror -none include/linux/vfio.h

  include/linux/vfio.h:114: warning: Function parameter or member 'name' not described in 'vfio_device_ops'
  include/linux/vfio.h:143: warning: Cannot understand  * @migration_set_state: Optional callback to change the migration state for
   on line 143 - I thought it was a doc line
  include/linux/vfio.h:168: warning: Cannot understand  * @log_start: Optional callback to ask the device start DMA logging.
   on line 168 - I thought it was a doc line
Signed-off-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230329120603.468031-1-horms@kernel.orgSigned-off-by: Alex Williamson <alex.williamson@redhat.com>

include/linux/vfio.h

@@ -68,6 +68,7 @@ struct vfio_device {
 /**
  * struct vfio_device_ops - VFIO bus driver device callbacks
  *
+ * @name: Name of the device driver.
  * @init: initialize private fields in device structure
  * @release: Reclaim private fields in device structure
  * @bind_iommufd: Called when binding the device to an iommufd
@@ -140,6 +141,8 @@ int vfio_iommufd_emulated_attach_ioas(struct vfio_device *vdev, u32 *pt_id);
 #endif
 
 /**
+ * struct vfio_migration_ops - VFIO bus device driver migration callbacks
+ *
  * @migration_set_state: Optional callback to change the migration state for
  *         devices that support migration. It's mandatory for
  *         VFIO_DEVICE_FEATURE_MIGRATION migration support.
@@ -165,6 +168,8 @@ struct vfio_migration_ops {
 };
 
 /**
+ * struct vfio_log_ops - VFIO bus device driver logging callbacks
+ *
  * @log_start: Optional callback to ask the device start DMA logging.
  * @log_stop: Optional callback to ask the device stop DMA logging.
  * @log_read_and_clear: Optional callback to ask the device read