Rename MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE

New name MBEDTLS_ERR_SSL_BAD_CERTIFICATE

Also, replace some instances of MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE
by MBEDTLS_ERR_SSL_DECODE_ERROR and MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER
as fit.

Signed-off-by: Hanno Becker <hanno.becker@arm.com>
diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 4ff8a93..b4634c2 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -2876,7 +2876,7 @@
     if( ssl_check_server_ecdh_params( ssl ) != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server certificate (ECDH curve)" ) );
-        return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
+        return( MBEDTLS_ERR_SSL_BAD_CERTIFICATE );
     }
 
 #if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)