staging: unisys: visorbus: don't need local variable cmd

The local variable cmd was just being used to dereference a field inside
of it. Get rid of the variable and just derefernce the parameter being
passed in.

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

@@ -595,9 +595,8 @@ err_respond:
 
 static int visorbus_destroy(struct controlvm_message *inmsg)
 {
-	struct controlvm_message_packet *cmd = &inmsg->cmd;
 	struct controlvm_message_header *pmsg_hdr = NULL;
-	u32 bus_no = cmd->destroy_bus.bus_no;
+	u32 bus_no = inmsg->cmd.destroy_bus.bus_no;
 	struct visor_device *bus_info;
 	int err;