define AdiPort::get_mutex out of line

Author: liam-teale

include/pros/devices/port.hpp

@@ -243,14 +243,7 @@ class AdiPort {
      *
      * @return pros::RecursiveMutex&
      */
-    pros::RecursiveMutex& get_mutex() const {
-        if (m_host_port.as_number() > 22 || m_index > 7) {
-            // return a reference to the invalid port mutex
-            return SmartPort::from_number(33).get_mutex();
-        } else {
-            return m_host_port.get_mutex();
-        }
-    }
+    pros::RecursiveMutex& get_mutex() const;
 
   private:
     // the integrated ADI ports on the brain are represented by the virtual port 22

src/devices/port.cpp

@@ -10,4 +10,13 @@ pros::RecursiveMutex& SmartPort::get_mutex() const {
         return m_mutexes.back();
     }
 }
+
+pros::RecursiveMutex& AdiPort::get_mutex() const {
+    if (m_host_port.as_number() > 22 || m_index > 7) {
+        // return a reference to the invalid port mutex
+        return SmartPort::from_number(33).get_mutex();
+    } else {
+        return m_host_port.get_mutex();
+    }
+}
 }; // namespace zest