BUG_ON() Conversion in drivers/block/

this changes if() BUG(); constructs to BUG_ON() which is
cleaner, contains unlikely() and can better optimized away.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

diff --cc drivers/block/DAC960.c
Simple merge

diff --cc drivers/block/cciss.c
Simple merge

diff --cc drivers/block/cciss_scsi.c
Simple merge

diff --cc drivers/block/cpqarray.c
Simple merge