Add arch for CMSIS-RTOS v1 and v2

mongoose.c

@@ -4250,7 +4250,7 @@ static void mg_set_non_blocking_mode(MG_SOCKET_TYPE fd) {
 #elif MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK
   unsigned long on = 1;
   ioctlsocket(fd, FIONBIO, &on);
-#elif MG_ARCH == MG_ARCH_RTX
+#elif MG_ENABLE_RL
   unsigned long on = 1;
   ioctlsocket(fd, FIONBIO, &on);
 #elif MG_ENABLE_FREERTOS_TCP
@@ -5734,6 +5734,10 @@ uint64_t mg_millis(void) {
   return (uint64_t) Clock_getTicks();
 #elif MG_ARCH == MG_ARCH_ZEPHYR
   return (uint64_t) k_uptime_get();
+#elif MG_ARCH == MG_ARCH_CMSIS_RTOS1
+  return (uint64_t)rt_time_get();
+#elif MG_ARCH == MG_ARCH_CMSIS_RTOS2
+  return (uint64_t)((osKernelGetTickCount() * 1000) / osKernelGetTickFreq());
 #elif MG_ARCH == MG_ARCH_UNIX && defined(__APPLE__)
   // Apple CLOCK_MONOTONIC_RAW is equivalent to CLOCK_BOOTTIME on linux
   // Apple CLOCK_UPTIME_RAW is equivalent to CLOCK_MONOTONIC_RAW on linux