staging: unisys: visorbus: Remove check for valid parm_addr.

The variable parm_addr will never be null, so no need to check for it.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorchipset.c

@@ -1523,7 +1523,7 @@ static int handle_command(struct controlvm_message inmsg, u64 channel_addr)
 	 * within our OS-controlled memory. We need to know that, because it
 	 * makes a difference in how we compute the virtual address.
 	 */
-	if (parm_addr && parm_bytes) {
+	if (parm_bytes) {
 		bool retry = false;
 
 		parser_ctx =