qla2xxx: Add flush after updating ATIOQ consumer index.
qla2xxx: Add flush after updating ATIOQ consumer index.

After updating the consumer index of ATIO Q, a read is
required to flush the write to the adapter register.

Signed-off-by: Quinn Tran <a02f5c47ee09ecfb205631316fdc727ed52eb140@qlogic.com>
Signed-off-by: Himanshu Madhani <a1599b7f51f3890722b2125e7c07879c181c9399@qlogic.com>
Reviewed-by: Nicholas Bellinger <978acd1567d5598152161fdf8bf3ca568f950c9b@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <978acd1567d5598152161fdf8bf3ca568f950c9b@linux-iscsi.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs