hostmot2.c/fwid: handle HM2_GTAG_FWID function
hostmot2.c/fwid: handle HM2_GTAG_FWID function

while the function would be parsed fine by hm2_parse_module_descriptors(),
this would be too late since some of the values are referred to before
(eg hm2_read_idrom() refers to llio->pins_per_connector).
So, special case the fwid message and handle early (see next commits).

socfpga-rbf 1.159 and later: the 7I76_7I76_7I76_7I76 and 7I76_7I85S_GPIO_GPIO
rbf files already contain a matching fwid proto message.

mhaberler/machinekit,mhaberler/machinekit,mhaberler/machinekit,mhaberler/machinekit,ArcEye/MK-Qt5,strahlex/machinekit,ArcEye/MK-Qt5,strahlex/machinekit,ArcEye/MK-Qt5,strahlex/machinekit,ArcEye/MK-Qt5,strahlex/machinekit,mhaberler/machinekit,mhaberler/machinekit,ArcEye/MK-Qt5,strahlex/machinekit,strahlex/machinekit,strahlex/machinekit,mhaberler/machinekit,ArcEye/MK-Qt5,ArcEye/MK-Qt5,mhaberler/machinekit,ArcEye/MK-Qt5