Add option to control Solenoids under PARKING_EXTRUDER (#12028)

Marlin/src/feature/solenoid.cpp

@@ -22,13 +22,13 @@
 
 #include "../inc/MarlinConfig.h"
 
-#if ENABLED(EXT_SOLENOID)
+#if ENABLED(EXT_SOLENOID) || ENABLED(MANUAL_SOLENOID_CONTROL)
 
 #include "solenoid.h"
 
 #include "../module/motion.h" // for active_extruder
 
-inline void enable_solenoid(const uint8_t num) {
+void enable_solenoid(const uint8_t num) {
   switch (num) {
     case 0:
       OUT_WRITE(SOL0_PIN, HIGH);

Marlin/src/feature/solenoid.h

@@ -25,5 +25,6 @@
 
 void enable_solenoid_on_active_extruder();
 void disable_all_solenoids();
+void enable_solenoid(const uint8_t num);
 
 #endif // __SOLENOID_H__