Doc: Explicitly declaring that nodedev-destroy only works for vHBA

Though trying to destroy a physical HBA doesn't make sense at all,
it's still a bit misleading with saying "only works for HBA".
Signed-off-by: NOsier Yang <jyang@redhat.com>

src/libvirt.c

@@ -16070,8 +16070,9 @@ error:
  * virNodeDeviceDestroy:
  * @dev: a device object
  *
- * Destroy the device object. The virtual device is removed from the host operating system.
- * This function may require privileged access
+ * Destroy the device object. The virtual device (only works for vHBA
+ * currently) is removed from the host operating system.  This function
+ * may require privileged access.
  *
  * Returns 0 in case of success and -1 in case of failure.
  */

tools/virsh.pod

@@ -2158,9 +2158,9 @@ contains xml for a top-level <device> description of a node device.
 =item B<nodedev-destroy> I<device>
 
 Destroy (stop) a device on the host. I<device> can be either device
-name or wwn pair in "wwnn,wwpn" format (only works for HBA). Note
-that this makes libvirt quit managing a host device, and may even make
-that device unusable by the rest of the physical host until a reboot.
+name or wwn pair in "wwnn,wwpn" format (only works for vHBA currently).
+Note that this makes libvirt quit managing a host device, and may even
+make that device unusable by the rest of the physical host until a reboot.
 
 =item B<nodedev-detach> I<nodedev> [I<--driver backend_driver>]