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

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

Orabug: 26330509

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>
(cherry picked from commit cea0a3c305fa348cfad3bae4a226c241720daf55)
Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>
Reviewed-by: Jack Vogel <jack.vogel@oracle.com>