Drop a conditional only used once

Marlin/src/module/probe.cpp

@@ -374,15 +374,15 @@ bool set_probe_deployed(const bool deploy) {
 
   if (endstops.z_probe_enabled == deploy) return false;
 
-  // Fix-mounted probe should only raise for deploy
-  #if ENABLED(FIX_MOUNTED_PROBE)
-    #define RAISE_COND deploy
-  #else
-    #define RAISE_COND true
-  #endif
-
   // Make room for probe to deploy (or stow)
-  if (RAISE_COND) do_probe_raise(_Z_CLEARANCE_DEPLOY_PROBE);
+  // Fix-mounted probe should only raise for deploy
+  if (
+    #if ENABLED(FIX_MOUNTED_PROBE)
+      deploy
+    #else
+      true
+    #endif
+  ) do_probe_raise(max(Z_CLEARANCE_BETWEEN_PROBES, Z_CLEARANCE_DEPLOY_PROBE));
 
   #if ENABLED(Z_PROBE_SLED) || ENABLED(Z_PROBE_ALLEN_KEY)
     #if ENABLED(Z_PROBE_SLED)