powerpc/86xx: disable IDE subsystem in mpc8610_hpcd_defconfig

This patch disables deprecated IDE subsystem in mpc8610_hpcd_defconfig
(no IDE host drivers are selected in this config so there is no valid
reason to enable IDE subsystem itself).
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Scott Wood <oss@buserror.net>

arch/powerpc/configs/86xx/mpc8610_hpcd_defconfig

@@ -49,7 +49,6 @@ CONFIG_MTD_NAND_FSL_ELBC=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=131072
-CONFIG_IDE=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_CHR_DEV_SG=y
 CONFIG_ATA=y