core: imx: enable attestation PTA

Enable the attestation PTA by default for i.MX platforms.

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

@@ -542,6 +542,7 @@ CFG_SHMEM_START ?= ($(CFG_TZDRAM_START) + $(CFG_TZDRAM_SIZE))
 
 # Enable embedded tests by default
 CFG_ENABLE_EMBEDDED_TESTS ?= y
+CFG_ATTESTATION_PTA ?= y
 
 # Set default heap size for imx platforms to 128k
 CFG_CORE_HEAP_SIZE ?= 131072