Fix incorrect command-line parameters for Solaris (#22865)

* Fix incorrect command-line parameters for Solaris

* Update mount.py

lib/ansible/modules/system/mount.py

@@ -317,7 +317,10 @@ def unset_mount(module, args):
 def _set_fstab_args(fstab_file):
     result = []
 
-    if fstab_file and fstab_file != '/etc/fstab':
+    if (
+            fstab_file and
+            fstab_file != '/etc/fstab' and
+            get_platform().lower() != 'sunos'):
         if get_platform().lower().endswith('bsd'):
             result.append('-F')
         else: