staging: gpib: fix kernel-doc section for function usb_gpib_interface_clear()

Add '@' character in kernel-doc comment in order 'assert' to be picked as
argument by the kernel-doc compiler.

This change fix the following warning:

warning: Function parameter or struct member 'assert' not described in
'usb_gpib_interface_clear'

Signed-off-by: Gaston Gonzalez <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: gascoar

drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c

@@ -621,7 +621,7 @@ static int usb_gpib_go_to_standby(struct gpib_board *board)
  * usb_gpib_interface_clear() - Assert or de-assert IFC
  *
  * @board:    the gpib_board data area for this gpib interface
- * assert:    1: assert IFC;  0: de-assert IFC
+ * @assert:   1: assert IFC;  0: de-assert IFC
  *
  *    Currently on the assert request we issue the lpvo IBZ
  *    command that cycles IFC low for 100 usec, then we ignore