GSUP: Fix spare and pdp_type_org fields swapped in PDPAddress IE

A recent commit added records to separate 2 binary octets into known
fields, but 2 fields filling 1 byte were actually written swapped. Fix
it now.

Fixes: 7b7a1e8ed16e41d95aed72a15f4ddf1857566b2e
Change-Id: I884bddb0e1e5f1cfc5615c11d6c7d602d0df9224
2 files changed