usb: cdns3: ep0: Fix a bunch of kerneldoc issues

Add some missing function argument descriptions for 'ep', 'desc'
and 'zlp', and correct spelling/bitrot issues surrounding the
correct spelling of present args.

Fixes the following W=1 warnings:

 drivers/usb/cdns3/ep0.c:36: warning: Function parameter or member 'zlp' not described in 'cdns3_ep0_run_transfer'
 drivers/usb/cdns3/ep0.c:236: warning: Function parameter or member 'ctrl' not described in 'cdns3_req_ep0_get_status'
 drivers/usb/cdns3/ep0.c:236: warning: Excess function parameter 'ctrl_req' description in 'cdns3_req_ep0_get_status'
 drivers/usb/cdns3/ep0.c:411: warning: Function parameter or member 'ctrl' not described in 'cdns3_req_ep0_handle_feature'
 drivers/usb/cdns3/ep0.c:411: warning: Excess function parameter 'ctrl_req' description in 'cdns3_req_ep0_handle_feature'
 drivers/usb/cdns3/ep0.c:661: warning: Function parameter or member 'ep' not described in 'cdns3_gadget_ep0_enable'
 drivers/usb/cdns3/ep0.c:661: warning: Function parameter or member 'desc' not described in 'cdns3_gadget_ep0_enable'
 drivers/usb/cdns3/ep0.c:671: warning: Function parameter or member 'ep' not described in 'cdns3_gadget_ep0_disable'
 drivers/usb/cdns3/ep0.c:867: warning: Function parameter or member 'priv_ep' not described in 'cdns3_init_ep0'
 drivers/usb/cdns3/ep0.c:867: warning: Excess function parameter 'ep_priv' description in 'cdns3_init_ep0'

Cc: Pawel Laszczak <pawell@cadence.com>
Cc: Pawel Jez <pjez@cadence.com>
Cc: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200702144625.2533530-15-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/cdns3/ep0.c

@@ -227,7 +227,7 @@ static int cdns3_req_ep0_set_address(struct cdns3_device *priv_dev,
 /**
  * cdns3_req_ep0_get_status - Handling of GET_STATUS standard USB request
  * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
+ * @ctrl: pointer to received setup packet
  *
  * Returns 0 if success, error code on error
  */
@@ -401,7 +401,7 @@ static int cdns3_ep0_feature_handle_endpoint(struct cdns3_device *priv_dev,
  * Handling of GET/SET_FEATURE standard USB request
  *
  * @priv_dev: extended gadget object
- * @ctrl_req: pointer to received setup packet
+ * @ctrl: pointer to received setup packet
  * @set: must be set to 1 for SET_FEATURE request
  *
  * Returns 0 if success, error code on error
@@ -654,6 +654,9 @@ void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir)
 
 /**
  * cdns3_gadget_ep0_enable
+ * @ep: pointer to endpoint zero object
+ * @desc: pointer to usb endpoint descriptor
+ *
  * Function shouldn't be called by gadget driver,
  * endpoint 0 is allways active
  */
@@ -665,6 +668,8 @@ static int cdns3_gadget_ep0_enable(struct usb_ep *ep,
 
 /**
  * cdns3_gadget_ep0_disable
+ * @ep: pointer to endpoint zero object
+ *
  * Function shouldn't be called by gadget driver,
  * endpoint 0 is allways active
  */
@@ -691,6 +696,7 @@ static int cdns3_gadget_ep0_set_halt(struct usb_ep *ep, int value)
  * @ep: pointer to endpoint zero object
  * @request: pointer to request object
  * @gfp_flags: gfp flags
+ * @zlp: add zero length packet
  *
  * Returns 0 on success, error code elsewhere
  */
@@ -860,7 +866,7 @@ void cdns3_ep0_config(struct cdns3_device *priv_dev)
 /**
  * cdns3_init_ep0 Initializes software endpoint 0 of gadget
  * @priv_dev: extended gadget object
- * @ep_priv: extended endpoint object
+ * @priv_ep: extended endpoint object
  *
  * Returns 0 on success else error code.
  */