fix portability: replace min() macro with MIN()

Replace min() macro usage with MIN() for portability reasons.

Author: manuelinbrain

nimble/controller/src/ble_ll_ctrl.c

@@ -34,10 +34,6 @@
 #include "controller/ble_ll_tmr.h"
 #include "ble_ll_conn_priv.h"
 
-#ifndef min
-#define min(a, b) ((a) < (b) ? (a) : (b))
-#endif
-
 #if MYNEWT_VAL(BLE_LL_ROLE_PERIPHERAL) || MYNEWT_VAL(BLE_LL_ROLE_CENTRAL)
 
 /* To use spec sample data for testing */
@@ -2135,7 +2131,7 @@ ble_ll_conn_chk_conn_update_req(const struct ble_ll_conn_upd_req *req)
     /* The transmitWindowSize shall be a multiple of 1.25 ms in the range
      * 1.25 ms to the lesser of 10 ms and (connInterval - 1.25 ms).
      */
-    if ((req->winsize < 1) || (req->winsize > min(8, req->interval - 1))) {
+    if ((req->winsize < 1) || (req->winsize > MIN(8, req->interval - 1))) {
         return false;
     }