Although it's unused by the driver, add the interrupt handle field in
the descriptor to the descriptor structure for completeness, and
explicitly add the reserved padding field on the end of the structure
too. This means that when a descriptor is defined on the stack, or
initialized by the compiler, the unused/reserved space will be zeroed
appropriately.
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
a2bc5d7bcc