crypto: jitterentropy - Delete unnecessary checks before the function call "kzfree"

The kzfree() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/jitterentropy.c

@@ -653,11 +653,9 @@ struct rand_data *jent_entropy_collector_alloc(unsigned int osr,
 
 void jent_entropy_collector_free(struct rand_data *entropy_collector)
 {
-	if (entropy_collector->mem)
-		jent_zfree(entropy_collector->mem);
+	jent_zfree(entropy_collector->mem);
 	entropy_collector->mem = NULL;
-	if (entropy_collector)
-		jent_zfree(entropy_collector);
+	jent_zfree(entropy_collector);
 	entropy_collector = NULL;
 }