video: fbdev-MMP: Fix a typo for the word "destroyed"

A word was corrected in the description for a parameter of
the mmp_unregister_path() function.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/mmp/core.c

@@ -224,7 +224,7 @@ EXPORT_SYMBOL_GPL(mmp_register_path);
 
 /*
  * mmp_unregister_path - unregister and destroy path
- * @p: path to be destoried.
+ * @p: path to be destroyed.
  *
  * this function registers path and destroys it.
  */