Locally link and remove unused funcs stack/btm/btm_inq

Towards readable code

Bug: 163134718
Tag: #refactor
Test: act.py -tc BleCocTest
Change-Id: Ifb5e07f6ed4c34af4fb06765d9db53ef802ad24b
diff --git a/system/stack/btm/btm_inq.cc b/system/stack/btm/btm_inq.cc
index 159bf52..d1adb36 100644
--- a/system/stack/btm/btm_inq.cc
+++ b/system/stack/btm/btm_inq.cc
@@ -129,11 +129,12 @@
 /******************************************************************************/
 /*            L O C A L    F U N C T I O N     P R O T O T Y P E S            */
 /******************************************************************************/
-void btm_clr_inq_db(const RawAddress* p_bda);
+static void btm_clr_inq_db(const RawAddress* p_bda);
 void btm_clr_inq_result_flt(void);
-void btm_inq_rmt_name_failed_cancelled(void);
-tBTM_STATUS btm_initiate_rem_name(const RawAddress& remote_bda, uint8_t origin,
-                                  uint64_t timeout_ms, tBTM_CMPL_CB* p_cb);
+static void btm_inq_rmt_name_failed_cancelled(void);
+static tBTM_STATUS btm_initiate_rem_name(const RawAddress& remote_bda,
+                                         uint8_t origin, uint64_t timeout_ms,
+                                         tBTM_CMPL_CB* p_cb);
 
 static uint8_t btm_convert_uuid_to_eir_service(uint16_t uuid16);
 void btm_set_eir_uuid(uint8_t* p_eir, tBTM_INQ_RESULTS* p_results);