bnx2x: Update to FW 7.8.19

bnx2x: Update to FW 7.8.19

This new firmware fixes several bugs:
 1. HW attention appears and traffic stops when iSCSI firmware tries to
    retransmit iSCSI login command when the iSCSI login is carrying data
    not aligned to 4-bytes.
 2. FCoE traffic fails to run when running in switch-independent multi-function
    mode and there's more than one interface supporting FCoE on a given port.
 3. While two ports are running FCoE with at least one of them has a function
    number (>1) on the same engine in a 4-port device a zeroed CQE is given,
    causing FCoE traffic to stop.

Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>