Convert CONFIG_SYS_IDE_MAXBUS et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_IDE_MAXBUS
   CONFIG_SYS_IDE_MAXDEVICE
   CONFIG_SYS_ATA_BASE_ADDR
   CONFIG_SYS_ATA_STRIDE
   CONFIG_SYS_ATA_DATA_OFFSET
   CONFIG_SYS_ATA_REG_OFFSET
   CONFIG_SYS_ATA_ALT_OFFSET
   CONFIG_SYS_ATA_IDE0_OFFSET
   CONFIG_SYS_ATA_IDE1_OFFSET
   CONFIG_ATAPI
   CONFIG_IDE_RESET

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/configs/malta64el_defconfig b/configs/malta64el_defconfig
index c44aa7e..756138d 100644
--- a/configs/malta64el_defconfig
+++ b/configs/malta64el_defconfig
@@ -27,6 +27,10 @@
 # CONFIG_ISO_PARTITION is not set
 CONFIG_ENV_IS_IN_FLASH=y
 CONFIG_ENV_ADDR=0xFFFFFFFFBE3E0000
+CONFIG_SYS_IDE_MAXBUS=1
+CONFIG_SYS_ATA_DATA_OFFSET=0
+CONFIG_SYS_ATA_REG_OFFSET=0
+CONFIG_SYS_ATA_IDE0_OFFSET=0x01f0
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_FLASH_CFI_DRIVER=y
 CONFIG_SYS_FLASH_USE_BUFFER_WRITE=y