Tweak filename in comment of acharveyex.h

Signed-off-by: Graham MacDonald <grahamamacdonald@gmail.com>

sys/include/acpi/acpica/platform/acharveyex.h

@@ -1,6 +1,6 @@
 /******************************************************************************
  *
- * Name: acdragonflyex.h - Extra OS specific defines, etc. for Harvey
+ * Name: acharveyex.h - Extra OS specific defines, etc. for Harvey
  *
  *****************************************************************************/