drivers:block: cpqarray clean up

Commit d4366414 ("cpqarray: remove it from the kernel") removes the
Kconfig option BLK_CPQ_DA and cpqarray.

Remove the dead build rule in the Makefile.
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

drivers/block/Makefile

@@ -15,7 +15,6 @@ obj-$(CONFIG_ATARI_FLOPPY)	+= ataflop.o
 obj-$(CONFIG_AMIGA_Z2RAM)	+= z2ram.o
 obj-$(CONFIG_BLK_DEV_RAM)	+= brd.o
 obj-$(CONFIG_BLK_DEV_LOOP)	+= loop.o
-obj-$(CONFIG_BLK_CPQ_DA)	+= cpqarray.o
 obj-$(CONFIG_BLK_CPQ_CISS_DA)  += cciss.o
 obj-$(CONFIG_BLK_DEV_DAC960)	+= DAC960.o
 obj-$(CONFIG_XILINX_SYSACE)	+= xsysace.o