zephyr: Add missing selection for allowed SHA algorithms

All of ED25519 backends allow SHA512, together with SHA512.
The ED25519 internally requires SHA512 for calculations, but
image may be hashed with any SHA algorithm.

The PSA has also been missing selecting of any SHA as allowed.

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

Author: de-nordic

boot/zephyr/Kconfig

@@ -287,11 +287,13 @@ choice BOOT_ED25519_IMPLEMENTATION
 config BOOT_ED25519_TINYCRYPT
 	bool "Use tinycrypt"
 	select BOOT_USE_TINYCRYPT
+	select BOOT_IMG_HASH_ALG_SHA256_ALLOW
 	select BOOT_IMG_HASH_ALG_SHA512_ALLOW
 
 config BOOT_ED25519_MBEDTLS
 	bool "Use mbedTLS"
 	select BOOT_USE_MBEDTLS
+	select BOOT_IMG_HASH_ALG_SHA256_ALLOW
 	select BOOT_IMG_HASH_ALG_SHA512_ALLOW
 	select MBEDTLS
 	select MBEDTLS_SHA512
@@ -302,10 +304,13 @@ config BOOT_ED25519_PSA
 	bool "Use PSA crypto"
 	select MBEDTLS
 	select BOOT_USE_PSA_CRYPTO
-	select MBEDTLS_PSA_CRYPTO_C
-	select MBEDTLS_ASN1_PARSE_C if MBEDTLS_BUILTIN
 	select PSA_CRYPTO_CLIENT
 	select PSA_CRYPTO_C
+	select MBEDTLS_PSA_CRYPTO_C
+	select MBEDTLS_ASN1_PARSE_C if MBEDTLS_BUILTIN
+	select MBEDTLS_ENABLE_HEAP
+	select BOOT_IMG_HASH_ALG_SHA256_ALLOW
+	select BOOT_IMG_HASH_ALG_SHA512_ALLOW
 	select BOOT_ED25519_PSA_DEPENDENCIES
 	select BOOT_X25519_PSA_DEPENDENCIES if BOOT_ENCRYPT_IMAGE