winpr/ssl: Call the winpr_enable_fips function only once

The `winpr_enable_fips`	function is called twice from the `winpr_InitializeSSL`
function after commit 49936a7b. I believe this is a bug, which might lead to
some undesired behavior. Let's call that only once.

(cherry picked from commit 554952a0bc)

winpr/libwinpr/utils/ssl.c

@@ -306,7 +306,7 @@ static BOOL CALLBACK _winpr_openssl_initialize(PINIT_ONCE once, PVOID param, PVO
 
 #endif
 	g_winpr_openssl_initialized_by_winpr = TRUE;
-	return winpr_enable_fips(flags);
+	return TRUE;
 }
 
 /* exported functions */