usb: gadget: function: u_ether: Downgrade kerneldoc headers which to not make the mark

Kerneldoc expects all function arguments to be documented.  If any
are missed it will complain.  Downgrade one header with 3 missing
argument descriptions and one which makes no attempt.

Fixes the following W=1 kernel build warning(s):

 drivers/usb/gadget/function/u_ether.c:750: warning: Function parameter or member 'dev_addr' not described in 'gether_setup_name'
 drivers/usb/gadget/function/u_ether.c:750: warning: Function parameter or member 'host_addr' not described in 'gether_setup_name'
 drivers/usb/gadget/function/u_ether.c:750: warning: Function parameter or member 'qmult' not described in 'gether_setup_name'
 drivers/usb/gadget/function/u_ether.c:1022: warning: Function parameter or member 'dev' not described in 'gether_cleanup'

Cc: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200706133341.476881-6-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/function/u_ether.c

@@ -730,7 +730,7 @@ static struct device_type gadget_type = {
 	.name	= "gadget",
 };
 
-/**
+/*
  * gether_setup_name - initialize one ethernet-over-usb link
  * @g: gadget to associated with these links
  * @ethaddr: NULL, or a buffer in which the ethernet address of the
@@ -1012,7 +1012,7 @@ int gether_get_ifname(struct net_device *net, char *name, int len)
 }
 EXPORT_SYMBOL_GPL(gether_get_ifname);
 
-/**
+/*
  * gether_cleanup - remove Ethernet-over-USB device
  * Context: may sleep
  *