crypto: starfive - Remove unneeded NULL checks

NULL check before kfree_sensitive function is not needed.
Signed-off-by: Jia Jie Ho <jiajie.ho@starfivetech.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311301702.LxswfETY-lkp@intel.com/Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/starfive/jh7110-rsa.c

@@ -45,12 +45,9 @@ static inline int starfive_pka_wait_done(struct starfive_cryp_ctx *ctx)
 
 static void starfive_rsa_free_key(struct starfive_rsa_key *key)
 {
-	if (key->d)
-		kfree_sensitive(key->d);
-	if (key->e)
-		kfree_sensitive(key->e);
-	if (key->n)
-		kfree_sensitive(key->n);
+	kfree_sensitive(key->d);
+	kfree_sensitive(key->e);
+	kfree_sensitive(key->n);
 	memset(key, 0, sizeof(*key));
 }