fix the PD Secondary Pin mask
fix the PD Secondary Pin mask

The Secondary Pin field of the Pin Descriptor uses bit 7 (the most
significant bit) to mean "this pin is an output".  It does not use bit
6 for anything, that bit is available to indicate the actual use of the
pin, just like bits 0-5.

This commit changes the mask applied to the Secondary Pin field so it
just masks out bit 7, not bit 7 and 6.

cnc-club/linuxcnc,unseenlaser/linuxcnc,cdsteinkuehler/MachineKit,kinsamanka/machinekit,bmwiedemann/linuxcnc-mirror,ikcalB/linuxcnc-mirror,strahlex/machinekit,ArcEye/machinekit-testing,cnc-club/linuxcnc,ianmcmahon/linuxcnc-mirror,ArcEye/MK-Qt5,RunningLight/machinekit,jaguarcat79/ILC-with-LinuxCNC,araisrobo/linuxcnc,mhaberler/machinekit,bobvanderlinden/machinekit,ArcEye/MK-Qt5,araisrobo/linuxcnc,EqAfrica/machinekit,ikcalB/linuxcnc-mirror,araisrobo/machinekit,araisrobo/machinekit,RunningLight/machinekit,bobvanderlinden/machinekit,araisrobo/machinekit,jaguarcat79/ILC-with-LinuxCNC,mhaberler/machinekit,kinsamanka/machinekit,RunningLight/machinekit,Cid427/machinekit,jaguarcat79/ILC-with-LinuxCNC,ikcalB/linuxcnc-mirror,ArcEye/machinekit-testing,aschiffler/linuxcnc,ianmcmahon/linuxcnc-mirror,ikcalB/linuxcnc-mirror,aschiffler/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,bobvanderlinden/machinekit,unseenlaser/machinekit,ArcEye/machinekit-testing,cnc-club/linuxcnc,kinsamanka/machinekit,cdsteinkuehler/MachineKit,mhaberler/machinekit,strahlex/machinekit,aschiffler/linuxcnc,strahlex/machinekit,Cid427/machinekit,araisrobo/machinekit,bobvanderlinden/machinekit,ianmcmahon/linuxcnc-mirror,EqAfrica/machinekit,kinsamanka/machinekit,araisrobo/machinekit,narogon/linuxcnc,ArcEye/machinekit-testing,araisrobo/linuxcnc,bmwiedemann/linuxcnc-mirror,unseenlaser/machinekit,unseenlaser/linuxcnc,unseenlaser/linuxcnc,cnc-club/linuxcnc,ArcEye/MK-Qt5,ArcEye/machinekit-testing,Cid427/machinekit,ArcEye/machinekit-testing,cdsteinkuehler/linuxcnc,ikcalB/linuxcnc-mirror,unseenlaser/machinekit,Cid427/machinekit,RunningLight/machinekit,Cid427/machinekit,narogon/linuxcnc,cdsteinkuehler/MachineKit,araisrobo/machinekit,ikcalB/linuxcnc-mirror,narogon/linuxcnc,ArcEye/MK-Qt5,ArcEye/MK-Qt5,bmwiedemann/linuxcnc-mirror,EqAfrica/machinekit,cdsteinkuehler/MachineKit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,cdsteinkuehler/linuxcnc,araisrobo/linuxcnc,araisrobo/linuxcnc,ArcEye/MK-Qt5,Cid427/machinekit,mhaberler/machinekit,mhaberler/machinekit,araisrobo/machinekit,EqAfrica/machinekit,unseenlaser/machinekit,mhaberler/machinekit,aschiffler/linuxcnc,RunningLight/machinekit,strahlex/machinekit,cdsteinkuehler/MachineKit,strahlex/machinekit,aschiffler/linuxcnc,narogon/linuxcnc,cdsteinkuehler/linuxcnc,bmwiedemann/linuxcnc-mirror,ArcEye/MK-Qt5,ianmcmahon/linuxcnc-mirror,bobvanderlinden/machinekit,mhaberler/machinekit,RunningLight/machinekit,EqAfrica/machinekit,ianmcmahon/linuxcnc-mirror,bmwiedemann/linuxcnc-mirror,unseenlaser/machinekit,ArcEye/MK-Qt5,unseenlaser/machinekit,cdsteinkuehler/linuxcnc,cdsteinkuehler/MachineKit,EqAfrica/machinekit,EqAfrica/machinekit,cdsteinkuehler/linuxcnc,ArcEye/machinekit-testing,araisrobo/machinekit,unseenlaser/linuxcnc,ianmcmahon/linuxcnc-mirror,jaguarcat79/ILC-with-LinuxCNC,kinsamanka/machinekit,araisrobo/machinekit,mhaberler/machinekit,strahlex/machinekit,unseenlaser/machinekit,cdsteinkuehler/linuxcnc,bobvanderlinden/machinekit,Cid427/machinekit,RunningLight/machinekit,bobvanderlinden/machinekit,kinsamanka/machinekit,bmwiedemann/linuxcnc-mirror,Cid427/machinekit,RunningLight/machinekit,ArcEye/machinekit-testing,bobvanderlinden/machinekit,narogon/linuxcnc,unseenlaser/machinekit,cnc-club/linuxcnc,cnc-club/linuxcnc,unseenlaser/linuxcnc,ianmcmahon/linuxcnc-mirror,strahlex/machinekit,kinsamanka/machinekit,ikcalB/linuxcnc-mirror,cnc-club/linuxcnc,EqAfrica/machinekit