Fix no-ec

Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5673)

Configure

@@ -485,7 +485,7 @@ my @disable_cascades = (
     "apps"              => [ "tests" ],
     "tests"             => [ "external-tests" ],
     "comp"              => [ "zlib" ],
-    "ec"                => [ "tls1_3" ],
+    "ec"                => [ "tls1_3", "sm2" ],
     sub { !$disabled{"unit-test"} } => [ "heartbeats" ],
 
     sub { !$disabled{"msan"} } => [ "asm" ],