Kconfig: Drop CONFIG_CMD_IMXOTP

This option is not used in U-Boot. Drop it.
Signed-off-by: NSimon Glass <sjg@chromium.org>

include/configs/ot1200.h

@@ -43,7 +43,6 @@
 #define CONFIG_SYS_I2C_SPEED            100000
 
 /* OCOTP Configs */
-#define CONFIG_CMD_IMXOTP
 #define CONFIG_IMX_OTP
 #define IMX_OTP_BASE                    OCOTP_BASE_ADDR
 #define IMX_OTP_ADDR_MAX                0x7F

scripts/config_whitelist.txt

@@ -383,7 +383,6 @@ CONFIG_CM922T_XA10
 CONFIG_CMDLINE_EDITING
 CONFIG_CMDLINE_PS_SUPPORT
 CONFIG_CMDLINE_TAG
-CONFIG_CMD_IMXOTP
 CONFIG_CMD_IMX_FUSE
 CONFIG_CMD_IO
 CONFIG_CMD_IOLOOP