scsi: fnic: Switch to use %ptSp

scsi: fnic: Switch to use %ptSp

Use %ptSp instead of open coded variants to print content of
struct timespec64 in human readable format.

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Karan Tilak Kumar <kartilak@cisco.com>
Link: https://patch.msgid.link/20251113150217.3030010-20-andriy.shevchenko@linux.intel.com
[pmladek@suse.com: Fixed output ordering and last_read_time update.]
Signed-off-by: Petr Mladek <pmladek@suse.com>