ide: add ide driver on build.mk

Signed-off-by: Takuya ASADA <syuu@cloudius-systems.com>
Signed-off-by: Avi Kivity <avi@cloudius-systems.com>

build.mk

@@ -546,6 +546,7 @@ drivers += drivers/hpet.o
 drivers += drivers/xenfront.o drivers/xenfront-xenbus.o drivers/xenfront-blk.o
 drivers += drivers/pvpanic.o
 drivers += drivers/random.o
+drivers += drivers/ide.o
 drivers += java/jvm_balloon.o
 
 objects = bootfs.o