illumos gate

Build errors with gcc 9:

    ../../common/io/bge/bge_kstats.c: In function 'bge_m_stat':
    ../../common/io/bge/bge_kstats.c:942:18: error: 'bstp' may be used uninitialized in this function [-Werror=maybe-uninitialized]
      942 |    *val = bstp->s.dot3StatsFrameTooLongs;
          |           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

    ../../common/io/bge/bge_chip2.c: In function 'bge_chip_factotum':
    ../../common/io/bge/bge_chip2.c:5378:6: error: 'dma_state' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     5378 |   if (dma_state != DDI_FM_OK) {
          |      ^
    cc1: all warnings being treated as errors