Fix the follow warnings:

./fs/cifs/connect.c: WARNING: Comparison of 0/1 to bool variable
Reported-by: NAbaci Robot <abaci@linux.alibaba.com>
Signed-off-by: NJiapeng Zhong <abaci-bugfix@linux.alibaba.com>
Signed-off-by: NSteve French <stfrench@microsoft.com>