sgsn: Convert cch_pdp to host order for libgtp

libgtp is calling gtpie_tv2 which will convert this uint16_t from host
to network order. So far libosmogsm and the sgsn treated the charging
characteristics as opaque data. So when moving from byte array to the
uint16_t do the swapping.

Change-Id: I977aec2e2f8d57802e45f591754e5733562d5c2a
1 file changed