emulators/open-vm-tools: fix build after 2587b74c6187 removed NDF_ONL…

…Y_PNBUF

After base commit 2587b74c6187, which removed NDF_ONLY_PNBUF,
emulators/open-vm-tools fails to build, with:

--- vfsops.o ---
vfsops.c:190:16: error: use of undeclared identifier 'NDF_ONLY_PNBUF'; did you mean 'NDFREE_PNBUF'?
   NDFREE(ndp, NDF_ONLY_PNBUF);
               ^~~~~~~~~~~~~~
               NDFREE_PNBUF
/usr/src/sys/sys/namei.h:291:6: note: 'NDFREE_PNBUF' declared here
void NDFREE_PNBUF(struct nameidata *);
     ^

Indeed, NDFREE_PNBUF() should now be used.

PR:		263041
Approved by:	garga (maintainer)
MFH:		2022Q2

emulators/open-vm-tools/files/patch-modules_freebsd_vmblock_vfsops.c

@@ -12,7 +12,7 @@
     VMBLOCKDEBUG("VMBlockVFSMount(mp = %p)\n", (void *)mp);
 
     /*
-@@ -171,7 +176,11 @@ VMBlockVFSMount(struct mount *mp,        // IN: mount(
+@@ -171,14 +176,22 @@ VMBlockVFSMount(struct mount *mp,        // IN: mount(
      * Find lower node and lock if not already locked.
      */
 
@@ -24,7 +24,18 @@
     error = namei(ndp);
     if (error) {
        NDFREE(ndp, 0);
-@@ -276,6 +285,11 @@ VMBlockVFSUnmount(struct mount *mp,    // IN: filesyst
+       uma_zfree(VMBlockPathnameZone, pathname);
+       return error;
+    }
++#ifdef NDF_ONLY_PNBUF
+    NDFREE(ndp, NDF_ONLY_PNBUF);
++#else
++   NDFREE_PNBUF(ndp);
++#endif
+
+    /*
+     * Check multi VMBlock mount to avoid `lock against myself' panic.
+@@ -276,6 +289,11 @@ VMBlockVFSUnmount(struct mount *mp,    // IN: filesyst
     void *mntdata;
     int error;
     int flags = 0, removed = 0;