net: cavium: Fix a bunch of kerneldoc parameter issues

Rename ptp to ptp_info.

Fix W=1 compile warnings (invalid kerneldoc):

drivers/net/ethernet/cavium/common/cavium_ptp.c:94: warning: Excess function parameter 'ptp' description in 'cavium_ptp_adjfine'
drivers/net/ethernet/cavium/common/cavium_ptp.c:141: warning: Excess function parameter 'ptp' description in 'cavium_ptp_adjtime'
drivers/net/ethernet/cavium/common/cavium_ptp.c:163: warning: Excess function parameter 'ptp' description in 'cavium_ptp_gettime'
drivers/net/ethernet/cavium/common/cavium_ptp.c:185: warning: Excess function parameter 'ptp' description in 'cavium_ptp_settime'
drivers/net/ethernet/cavium/common/cavium_ptp.c:208: warning: Excess function parameter 'ptp' description in 'cavium_ptp_enable'

Reported-by: Hulk Robot <[e-mail]>
Signed-off-by: Wang Hai <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/cavium/common/cavium_ptp.c

···
 
 /**
  * cavium_ptp_adjfine() - Adjust ptp frequency
- * @ptp: PTP clock info
+ * @ptp_info: PTP clock info
  * @scaled_ppm: how much to adjust by, in parts per million, but with a
  *              16 bit binary fractional field
  */
···
 
 /**
  * cavium_ptp_adjtime() - Adjust ptp time
- * @ptp:   PTP clock info
+ * @ptp_info:   PTP clock info
  * @delta: how much to adjust by, in nanosecs
  */
 static int cavium_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta)
···
 
 /**
  * cavium_ptp_gettime() - Get hardware clock time with adjustment
- * @ptp: PTP clock info
+ * @ptp_info: PTP clock info
  * @ts:  timespec
  */
 static int cavium_ptp_gettime(struct ptp_clock_info *ptp_info,
···
 
 /**
  * cavium_ptp_settime() - Set hardware clock time. Reset adjustment
- * @ptp: PTP clock info
+ * @ptp_info: PTP clock info
  * @ts:  timespec
  */
 static int cavium_ptp_settime(struct ptp_clock_info *ptp_info,
···
 
 /**
  * cavium_ptp_enable() - Request to enable or disable an ancillary feature.
- * @ptp: PTP clock info
+ * @ptp_info: PTP clock info
  * @rq:  request
  * @on:  is it on
  */