scsi: lpfc: Change lpfc_nodelist save_flags member into a bitmask

scsi: lpfc: Change lpfc_nodelist save_flags member into a bitmask

In attempt to reduce the amount of unnecessary ndlp->lock acquisitions in
the lpfc driver, change save_flags into an unsigned long bitmask and use
clear_bit/test_bit bitwise atomic APIs instead of reliance on ndlp->lock
for synchronization.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20241212233309.71356-7-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>