ims_usrloc_pcscf: fix warning deprecated-non-prototype
> In file included from usrloc_db.c:12:
> Warning: ./usrloc_db.h:131:5: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a subsequent definition [-Wdeprecated-non-prototype]
> int use_location_pcscf_table();
> ^
> usrloc_db.c:113:5: note: conflicting prototype is here
> int use_location_pcscf_table(str *domain)
> ^
> 1 warning generated.
(cherry picked from commit 35a87c98f4e84b65f82376dfb57050f43d0f355f)