zephyr: Fix image encryption configuration for mbedTLS.

Add a few missing Kconfig options.

Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>

boot/zephyr/Kconfig

@@ -63,6 +63,15 @@ config NRF_CC310_BL
 	bool
 	default n
 
+if BOOT_USE_MBEDTLS && MBEDTLS_BUILTIN
+
+config BOOT_AES_MBEDTLS_DEPENDENCIES
+	bool
+	select MBEDTLS_CIPHER_AES_ENABLED
+	select MBEDTLS_CIPHER_MODE_CTR_ENABLED
+
+endif
+
 menu "MCUBoot settings"
 
 config SINGLE_APPLICATION_SLOT
@@ -159,6 +168,7 @@ config BOOT_SIGNATURE_TYPE_RSA
 	select MBEDTLS_KEY_EXCHANGE_RSA_ENABLED if MBEDTLS_BUILTIN
 	select BOOT_ENCRYPTION_SUPPORT
 	select BOOT_IMG_HASH_ALG_SHA256_ALLOW
+	select BOOT_AES_MBEDTLS_DEPENDENCIES if MBEDTLS_BUILTIN && BOOT_ENCRYPT_IMAGE
 
 if BOOT_SIGNATURE_TYPE_RSA
 config BOOT_SIGNATURE_TYPE_RSA_LEN
@@ -227,6 +237,7 @@ config BOOT_ED25519_MBEDTLS
 	select BOOT_USE_MBEDTLS
 	select MBEDTLS
 	select MBEDTLS_ASN1_PARSE_C if MBEDTLS_BUILTIN
+	select BOOT_AES_MBEDTLS_DEPENDENCIES if MBEDTLS_BUILTIN && BOOT_ENCRYPT_IMAGE
 
 endchoice
 endif