scsi: lpfc: Update stat accounting for READ_STATUS mbox command

READ_STATUS tx/rx byte count fields are now expanded to 64 bit wide
counters.  This patch updates logic for the READ_STATUS mbox command when
displaying tx_word and rx_word statistics in sysfs.

Link: https://lore.kernel.org/r/20220412222008.126521-24-jsmart2021@gmail.com


Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>