Defines starting with `b' in bsd/if/ppc

• BFRSIZ bsd/if/ppc/mace.h:348
• BIUCC_BSWP bsd/if/ppc/mace.h:280
• BIUCC_SWRST bsd/if/ppc/mace.h:285
• BIUCC_XMTSP04 bsd/if/ppc/mace.h:281
• BIUCC_XMTSP112 bsd/if/ppc/mace.h:284
• BIUCC_XMTSP16 bsd/if/ppc/mace.h:282
• BIUCC_XMTSP64 bsd/if/ppc/mace.h:283