Move acc_ramp_init inside gsm_bts_alloc

The function initializes the struct owned by a bts, so it makes sense to
have it done there instead of somewhere else later.

It was most probably put in bsc_vty when it was initially introduced
because of all the data structure and object file mess I untangled
during last set of patches.

Change-Id: I66c4b208583e92070793183b83b3a7b7edf6ba00
8 files changed