Add support for RTC to interrupt, HACK in alpha_console temporary

Add support for RTC to interrupt, HACK in alpha_console temporary

dev/alpha_console.cc:
    Fix reference to tlaserclock, HACK FOR NOW
dev/alpha_console.hh:
    fix reference to tlaser_clock, HACK FOR NOW
dev/tsunami.cc:
    Add proper tsunami chip pointers
dev/tsunami.hh:
    add proper tsunami chip pointers add RTC interrupt capabilities
dev/tsunami_cchip.cc:
    Add proper Interrupt for RTC
dev/tsunami_cchip.hh:
    Add proper interrupt for RTC
dev/tsunami_io.cc:
dev/tsunami_io.hh:
    Make RTC interrupt
dev/tsunami_pchip.cc:
dev/tsunami_pchip.hh:
    Add back pointer to tsunami

--HG--
extra : convert_revision : 2b0a8616b0bed8d9962ee5ca643dce56b9922d52