mbedtls: fix incorrect kconfig dependencies on mbedtls

Fixed the building failures when WGET_HTTPS,NET_LWIP and MBEDTLS_LIB
are selected due to a few incorrect kconfig dependencies.

Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index a04fcaa..642cc11 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -2168,7 +2168,6 @@
 	select ASYMMETRIC_PUBLIC_KEY_SUBTYPE
 	select X509_CERTIFICATE_PARSER
 	select PKCS7_MESSAGE_PARSER
-	select MBEDTLS_LIB_CRYPTO
 	select MBEDTLS_LIB_TLS
 	select RSA_VERIFY_WITH_PKEY
 	select X509_CERTIFICATE_PARSER
diff --git a/lib/mbedtls/Kconfig b/lib/mbedtls/Kconfig
index 35d8c50..bb8ac5f 100644
--- a/lib/mbedtls/Kconfig
+++ b/lib/mbedtls/Kconfig
@@ -156,6 +156,7 @@
 
 config LEGACY_CRYPTO_CERT
 	bool "legacy certificate libraries"
+	depends on LEGACY_CRYPTO
 	select ASN1_DECODER_LEGACY if ASN1_DECODER
 	select ASYMMETRIC_PUBLIC_KEY_LEGACY if \
 		ASYMMETRIC_PUBLIC_KEY_SUBTYPE
@@ -491,7 +492,7 @@
 	depends on ASYMMETRIC_PUBLIC_KEY_MBEDTLS
 	depends on ASN1_DECODER_MBEDTLS
 	depends on ASYMMETRIC_PUBLIC_KEY_MBEDTLS
-	depends on MBEDTLS_LIB_CRYPTO
+	depends on MBEDTLS_LIB
 	help
 	  Enable MbedTLS TLS library. Required for HTTPs support
 	  in wget