fix: Use keysGetMaxTrims() instead of MAX_TRIMS (#3860)

* fix: use keysGetMaxTrims() instead of MAX_TRIMS

* feat: add support for virtual trims

This is necessary for radios like X-lite where half of the trims are simulated

radio/src/targets/simu/simpgmspace.cpp

@@ -479,7 +479,7 @@ uint32_t readTrims()
 {
   uint32_t result = 0;
 
-  for (int i = 0; i < MAX_TRIMS * 2; i++) {
+  for (int i = 0; i < keysGetMaxTrims() * 2; i++) {
     if (trimsStates[i]) {
       // TRACE("trim pressed %d", i);
       result |= 1 << i;