cifsd: add the check to work file lock and rename behaviors like Windows...

cifsd: add the check to work file lock and rename behaviors like Windows unless POSIX extensions are negotiated

This patch add the check to work file lock and rename behaviors
like Windows if POSIX extensions are not negotiated.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>