usb: host: ohci-at91: Demote kerneldoc headers down to basic comment blocks

Neither usb_hcd_at91_probe() nor usb_hcd_at91_remove()'s function
headers reach the standards required of a kerneldoc entry.  Only
one attempt at describing an argument was made, as it is not
correct (we're removing that too to save confusion).

Fixes the following kernel build warning(s):

 drivers/usb/host/ohci-at91.c:166: warning: Function parameter or member 'driver' not described in 'usb_hcd_at91_probe'
 drivers/usb/host/ohci-at91.c:166: warning: Function parameter or member 'pdev' not described in 'usb_hcd_at91_probe'
 drivers/usb/host/ohci-at91.c:259: warning: Function parameter or member 'hcd' not described in 'usb_hcd_at91_remove'
 drivers/usb/host/ohci-at91.c:259: warning: Function parameter or member 'pdev' not described in 'usb_hcd_at91_remove'
 drivers/usb/host/ohci-at91.c:259: warning: Excess function parameter 'dev' description in 'usb_hcd_at91_remove'

Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Thibaut VARENE <varenet@parisc-linux.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200702144625.2533530-21-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ohci-at91.c

@@ -153,7 +153,7 @@ static struct regmap *at91_dt_syscon_sfr(void)
 /* always called with process context; sleeping is OK */
 
 
-/**
+/*
  * usb_hcd_at91_probe - initialize AT91-based HCDs
  * Context: !in_interrupt()
  *
@@ -244,9 +244,8 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver,
 
 /* may be called with controller, bus, and devices active */
 
-/**
+/*
  * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs
- * @dev: USB Host Controller being removed
  * Context: !in_interrupt()
  *
  * Reverses the effect of usb_hcd_at91_probe(), first invoking