usb: c67x00: c67x00-hcd: Demote obvious misuse of kerneldoc to standard comment blocks

No attempt has been made to document any of the functions here.

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

 drivers/usb/c67x00/c67x00-hcd.c:237: warning: Function parameter or member 'sie' not described in 'c67x00_hcd_irq'
 drivers/usb/c67x00/c67x00-hcd.c:237: warning: Function parameter or member 'int_status' not described in 'c67x00_hcd_irq'
 drivers/usb/c67x00/c67x00-hcd.c:237: warning: Function parameter or member 'msg' not described in 'c67x00_hcd_irq'
 drivers/usb/c67x00/c67x00-hcd.c:267: warning: Function parameter or member 'hcd' not described in 'c67x00_hcd_start'
 drivers/usb/c67x00/c67x00-hcd.c:279: warning: Function parameter or member 'hcd' not described in 'c67x00_hcd_stop'

Cc: Peter Korsgaard <jacmet@sunsite.dk>
Cc: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200715093209.3165641-7-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/c67x00/c67x00-hcd.c

@@ -228,7 +228,7 @@ static int c67x00_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
  * Main part of host controller driver
  */
 
-/**
+/*
  * c67x00_hcd_irq
  *
  * This function is called from the interrupt handler in c67x00-drv.c
@@ -260,7 +260,7 @@ static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg)
 	}
 }
 
-/**
+/*
  * c67x00_hcd_start: Host controller start hook
  */
 static int c67x00_hcd_start(struct usb_hcd *hcd)
@@ -272,7 +272,7 @@ static int c67x00_hcd_start(struct usb_hcd *hcd)
 	return 0;
 }
 
-/**
+/*
  * c67x00_hcd_stop: Host controller stop hook
  */
 static void c67x00_hcd_stop(struct usb_hcd *hcd)