Move job recovery filename

Marlin/src/feature/power_loss_recovery.h

 
 class PrintJobRecovery {
   public:
+    static constexpr char filename[5] = "/PLR";
+
     static SdFile file;
     static job_recovery_info_t info;
 

Marlin/src/sd/cardreader.cpp

 
 #if ENABLED(POWER_LOSS_RECOVERY)
 
-  constexpr char job_recovery_file_name[5] = "/PLR";
-
   bool CardReader::jobRecoverFileExists() {
-    const bool exists = recovery.file.open(&root, job_recovery_file_name, O_READ);
+    const bool exists = recovery.file.open(&root, recovery.filename, O_READ);
     if (exists) recovery.file.close();
     return exists;
   }
   void CardReader::openJobRecoveryFile(const bool read) {
     if (!isDetected()) return;
     if (recovery.file.isOpen()) return;
-    if (!recovery.file.open(&root, job_recovery_file_name, read ? O_READ : O_CREAT | O_WRITE | O_TRUNC | O_SYNC))
-      SERIAL_ECHOLNPAIR(MSG_SD_OPEN_FILE_FAIL, job_recovery_file_name, ".");
+    if (!recovery.file.open(&root, recovery.filename, read ? O_READ : O_CREAT | O_WRITE | O_TRUNC | O_SYNC))
+      SERIAL_ECHOLNPAIR(MSG_SD_OPEN_FILE_FAIL, recovery.filename, ".");
     else if (!read)
-      SERIAL_ECHOLNPAIR(MSG_SD_WRITE_TO_FILE, job_recovery_file_name);
+      SERIAL_ECHOLNPAIR(MSG_SD_WRITE_TO_FILE, recovery.filename);
   }
 
   // Removing the job recovery file currently requires closing
   void CardReader::removeJobRecoveryFile() {
     if (jobRecoverFileExists()) {
       recovery.init();
-      removeFile(job_recovery_file_name);
+      removeFile(recovery.filename);
       #if ENABLED(DEBUG_POWER_LOSS_RECOVERY)
         SERIAL_ECHOPGM("Power-loss file delete");
         serialprintPGM(jobRecoverFileExists() ? PSTR(" failed.\n") : PSTR("d.\n"));