tls: use logical OR operator

Use the logical OR operator instead of the ternary operator where
applicable.

PR-URL: #44236
Reviewed-By: theanarkh <theratliter@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Feng Yu <F3n67u@outlook.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>

lib/internal/tls/secure-context.js

@@ -265,7 +265,7 @@ function configSecureContext(context, options = kEmptyObject, name = 'options')
   if (pfx !== undefined && pfx !== null) {
     if (ArrayIsArray(pfx)) {
       ArrayPrototypeForEach(pfx, (val) => {
-        const raw = val.buf ? val.buf : val;
+        const raw = val.buf || val;
         const pass = val.passphrase || passphrase;
         if (pass !== undefined && pass !== null) {
           context.loadPKCS12(toBuf(raw), toBuf(pass));