718fb97e11
* support chip clocks != COM_FREQ, by introducing sc_frequency (for the mainline code) and adding a frequency parameter right after the rate parameter to comcnattach() and com_kgdb_attach(). - Make com_isa and com_multi initialize sc_frequency to COM_FREQ. - Make i386/machdep.c and alpha/dec_xxx.c call com*attach() with the freq. parameter. * supio_attach_args get two more fields: a sc_ipl and a sc_arg, both ints. - com_supio uses the first for interupt establishment (all childs will, as soon as they exist) and the 2nd for sc_frequency. - drsupio passes sc_ipl alway as 5, and for the "com"s, sc_arg as 16*115200 - hyper will pass sc_ipl as 6, and sc_arg as 16 * 460800