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/MIP405_defconfig b/configs/MIP405_defconfig
index 76ba77c..254cd41 100644
--- a/configs/MIP405_defconfig
+++ b/configs/MIP405_defconfig
@@ -12,6 +12,7 @@
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_EEPROM=y
+CONFIG_CMD_IDE=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set