hm2 manpage: remove obsolete firmware advise
hm2 manpage: remove obsolete firmware advise

The hostmot2 firmware is distributed separately from emc2/linuxcnc now,
so don't advise users to symlink their RIP dirs into /lib/firmware...

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