[SCSI] qla4xxx: use CRB Register for Request Queue in-pointer
Switching from doorbell mechanism to CRB register based Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com> Signed-off-by: NShyam Sundar <shyam.sundar@qlogic.com> Signed-off-by: NRavi Anand <ravi.anand@qlogic.com> Reviewed-by: NMike Christie <michaelc@cs.wisc.edu> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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