Windows: VIOC_GETUNIXMODE = smb_IoctlGetUnixMode

Windows: VIOC_GETUNIXMODE = smb_IoctlGetUnixMode

VIOC_GETUNIXMODE pioctl should execute smb_IoctlGetUnixMode not
smb_IoctlSetUnixMode.

Reviewed-on: http://gerrit.openafs.org/6600
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>
(cherry picked from commit 1474b4a739c60f96a8d2e38546778ab9572c138d)

Change-Id: I248effacd831849f33fe0fd9785d3c00117a2607
Reviewed-on: http://gerrit.openafs.org/6826
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>