Convert CONFIG_CMD_IDE to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_IDE

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/motionpro_defconfig b/configs/motionpro_defconfig
index 5040ea5..ab9ea81 100644
--- a/configs/motionpro_defconfig
+++ b/configs/motionpro_defconfig
@@ -8,6 +8,7 @@
 CONFIG_AUTOBOOT_PROMPT="Autobooting in %d seconds, press \"<Esc><Esc>\" to stop\n"
 CONFIG_AUTOBOOT_STOP_STR="\x1b\x1b"
 CONFIG_CMD_ASKENV=y
+CONFIG_CMD_IDE=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y