Removes p_rng param from mbedtls_rsa_pkcs1_verify

Commit removes p_rng from mbedtls_rsa_pkcs1_verify
since p_rng has no relevance following the removal
of f_rng from this function.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
diff --git a/programs/pkey/dh_client.c b/programs/pkey/dh_client.c
index eb21566..bdbabb6 100644
--- a/programs/pkey/dh_client.c
+++ b/programs/pkey/dh_client.c
@@ -220,7 +220,7 @@
         goto exit;
     }
 
-    if( ( ret = mbedtls_rsa_pkcs1_verify( &rsa, NULL, MBEDTLS_RSA_PUBLIC,
+    if( ( ret = mbedtls_rsa_pkcs1_verify( &rsa, MBEDTLS_RSA_PUBLIC,
                                   MBEDTLS_MD_SHA256, 0, hash, p ) ) != 0 )
     {
         mbedtls_printf( " failed\n  ! mbedtls_rsa_pkcs1_verify returned %d\n\n", ret );