Staging: vt6656: removed VOID/PVOID definitions

Warnings about the usage of externs in .c files were not resolved here.

Signed-off-by: Andres More <more.andres@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/vt6656/tkip.c b/drivers/staging/vt6656/tkip.c
index 8ca1540..f83af59 100644
--- a/drivers/staging/vt6656/tkip.c
+++ b/drivers/staging/vt6656/tkip.c
@@ -183,7 +183,7 @@
  * Return Value: none
  *
  */
-VOID TKIPvMixKey(
+void TKIPvMixKey(
     PBYTE   pbyTKey,
     PBYTE   pbyTA,
     WORD    wTSC15_0,