intel/aubinator_error_decode: Fix structure decode data

intel/aubinator_error_decode: Fix structure decode data

The call to gen_print_group should provide a pointer to the beginning
of the the structure data, not the start of the batch data.

Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>