Fix typos in BP defines in BPMemory.h.

BPMEM_DISPLAYCOPYFILER -> BPMEM_DISPLAYCOPYFILTER
BPMEM_TX_SETLUT_4 -> BPMEM_TX_SETTLUT_4
Add all BP regs to the switch statement in GetBPRegInfo.

Makes the FIFO player's Analyze page more informative in terms of
providing the names for some commands. Descriptions are still needed however.