encrypted-keys: remove trusted-keys dependency

Encrypted keys are decrypted/encrypted using either a trusted-key or,
for those systems without a TPM, a user-defined key.  This patch
removes the trusted-keys and TCG_TPM dependencies.

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
diff --git a/security/Kconfig b/security/Kconfig
index 22847a8..51bd5a0 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -38,7 +38,9 @@
 
 config ENCRYPTED_KEYS
 	tristate "ENCRYPTED KEYS"
-	depends on KEYS && TRUSTED_KEYS
+	depends on KEYS
+	select CRYPTO
+	select CRYPTO_HMAC
 	select CRYPTO_AES
 	select CRYPTO_CBC
 	select CRYPTO_SHA256