nimble/ll: Replace BLE_NUM_COMP_PKT_RATE with an interval in ms

Using an OS specific define in MYNEWT_VAL can be cumbersome
when porting to other systems. Replace this value with
universal interval in milliseconds.

nimble/controller/src/ble_ll_conn_hci.c

@@ -264,7 +264,7 @@ ble_ll_conn_num_comp_pkts_event_send(struct ble_ll_conn_sm *connsm)
      * (i.e. enqueued in a connection state machine).
      */
     if ((ble_npl_stime_t)(ble_npl_time_get() - g_ble_ll_last_num_comp_pkt_evt) <
-                                            MYNEWT_VAL(BLE_NUM_COMP_PKT_RATE)) {
+        ble_npl_time_ms_to_ticks32(MYNEWT_VAL(BLE_LL_NUM_COMP_PKT_ITVL_MS))) {
         /*
          * If this connection has completed packets, send an event right away.
          * We do this to increase throughput but we dont want to search the

nimble/controller/syscfg.yml

@@ -72,12 +72,11 @@ syscfg.defs:
         description: 'Transmit power level.'
         value: '0'
 
-    BLE_NUM_COMP_PKT_RATE:
+    BLE_LL_NUM_COMP_PKT_ITVL_MS:
         description: >
-            Determines the maximum rate at which the controller will send the
+            Determines the interval at which the controller will send the
-            number of completed packets event to the host. Rate is in os time
+            number of completed packets event to the host. Rate is in milliseconds.
-            ticks.
+        value: 2000
-        value: '(2 * OS_TICKS_PER_SEC)'
 
     BLE_LL_MFRG_ID:
         description: >
@@ -369,6 +368,11 @@ syscfg.defs:
         description: Superseded by BLE_CONTROLLER
         value: 1
         defunct: 1
+    BLE_NUM_COMP_PKT_RATE:
+        description: Superseded by BLE_LL_NUM_COMP_PKT_ITVL_MS
+        value: '(2 * OS_TICKS_PER_SEC)'
+        defunct: 1
+
 
 syscfg.vals.BLE_LL_CFG_FEAT_LL_EXT_ADV:
     BLE_LL_CFG_FEAT_LE_CSA2: 1

porting/npl/riot/include/syscfg/syscfg.h

@@ -594,8 +594,8 @@
 #define MYNEWT_VAL_BLE_LP_CLOCK (1)
 #endif
 
-#ifndef MYNEWT_VAL_BLE_NUM_COMP_PKT_RATE
+#ifndef MYNEWT_VAL_BLE_LL_NUM_COMP_PKT_ITVL_MS
-#define MYNEWT_VAL_BLE_NUM_COMP_PKT_RATE ((2 * 128)) /* XXX */
+#define MYNEWT_VAL_BLE_LL_NUM_COMP_PKT_ITVL_MS (2000)
 #endif
 
 #ifndef MYNEWT_VAL_BLE_PUBLIC_DEV_ADDR