arm: colibri_pxa270_defconfig: disable IDE subsystem

This patch disables deprecated IDE subsystem in colibri_pxa270_defconfig
(no IDE host drivers are selected in this config so there is no valid
reason to enable IDE subsystem itself).

Cc: Daniel Mack <daniel@zonque.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>

arch/arm/configs/colibri_pxa270_defconfig

@@ -83,7 +83,6 @@ CONFIG_BLK_DEV_CRYPTOLOOP=m
 CONFIG_BLK_DEV_NBD=y
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_COUNT=8
-CONFIG_IDE=y
 CONFIG_NETDEVICES=y
 CONFIG_PHYLIB=y
 CONFIG_NET_ETHERNET=y