Defines starting with `b' in bsd/dev/ppc/drvSymbios8xx

• BBCK bsd/dev/ppc/drvSymbios8xx/Sym8xxRegs.h:291
• BF bsd/dev/ppc/drvSymbios8xx/Sym8xxRegs.h:176
• BL2 bsd/dev/ppc/drvSymbios8xx/Sym8xxRegs.h:295
• BO89 bsd/dev/ppc/drvSymbios8xx/Sym8xxRegs.h:296