staging: vt6655: fix comparison of bool to 0/1

This patch corrects comparison of bool to 0/1 for file
drivers/staging/vt6655/rxtx.c. The following type of coccinelle detected
warnings are silenced:

WARNING: Comparison of bool to 0/1

Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>