bts: Remove global state and the usage of the gprs_rlcmac_bts
Global state makes mocking/writing tests more difficult. Continue
by removing direct usage of the bts and adding it as pointer to
the function calls (showing the true dependencies of the functions)
diff --git a/src/gprs_rlcmac.h b/src/gprs_rlcmac.h
index 8863af4..b8afdcd 100644
--- a/src/gprs_rlcmac.h
+++ b/src/gprs_rlcmac.h
@@ -146,7 +146,7 @@
int gprs_rlcmac_dl_bw(struct gprs_rlcmac_tbf *tbf, uint16_t octets);
-int sba_alloc(uint8_t *_trx, uint8_t *_ts, uint32_t *_fn, uint8_t ta);
+int sba_alloc(struct gprs_rlcmac_bts *bts, uint8_t *_trx, uint8_t *_ts, uint32_t *_fn, uint8_t ta);
struct gprs_rlcmac_sba *sba_find(uint8_t trx, uint8_t ts, uint32_t fn);