nrf_security: Disable Mbed TLS heap when building for TFM

Mbed TLS heap is not needed for TF-M use cases where
legacy APIs are not used.

Remove default enablement of MBEDTLS_ENABLE_HEAP when
BUILD_WITH_TFM is set.

Signed-off-by: Juha Ylinen <[email protected]>

Author: juhaylinen

subsys/nrf_security/Kconfig

@@ -89,7 +89,6 @@ config MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE
 
 config MBEDTLS_ENABLE_HEAP
 	bool "Enable global heap for mbed TLS"
-	default y if BUILD_WITH_TFM
 	help
 	  This option enables the mbedtls to use the heap. This setting must
 	  be global so that various applications and libraries in Zephyr do not