core: imx: enable CFG_CORE_HUK_SUBKEY_COMPAT_USE_OTP_DIE_ID by default

Use the platform tee_otp_get_die_id() implementation to generate the SSK
key.

Signed-off-by: Clement Faure <clement.faure@nxp.com>
Signed-off-by: Sahil Malhotra <sahil.malhotra@nxp.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>

core/arch/arm/plat-imx/conf.mk

@@ -557,6 +557,7 @@ endif
 CFG_IMX_OCOTP ?= y
 CFG_IMX_DIGPROG ?= y
 CFG_PKCS11_TA ?= y
+CFG_CORE_HUK_SUBKEY_COMPAT_USE_OTP_DIE_ID ?= y
 
 # Almost all platforms include CAAM HW Modules, except the
 # ones forced to be disabled