13573 stop working around broken _msg makefiles and fix them
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Yuri Pankov <yuripv@yuripv.dev>
Approved by: Gordon Ross <gordon.w.ross@gmail.com>

PSARC 2009/646 bd - generic block device driver
PSARC 2009/648 sdcard conversion to bd, EOF blk2scsa
6952618 deliver blkdev (PSARC 2009/646)