Improve scrypt cracking speed on CPU by 20%, preparation for Ethereum KDF

hashcat.hctune

@@ -464,3 +464,10 @@ ALIAS_Apple_Iris_Pro                            *       13733   1       1
 
 DEVICE_TYPE_GPU                                 *       14600   1       2       1024
 DEVICE_TYPE_GPU                                 *       14800   1       2       1000
+
+###########
+## SCRYPT #
+###########
+
+DEVICE_TYPE_CPU                                 *       8900    1       1       1
+DEVICE_TYPE_CPU                                 *       9300    1       1       1

src/opencl.c

@@ -3716,8 +3716,11 @@ int opencl_session_begin (hashcat_ctx_t *hashcat_ctx)
         }
       }
 
-      device_param->kernel_accel_min = 1;
-      device_param->kernel_accel_max = 8;
+      if (user_options->kernel_accel_chgd == false)
+      {
+        device_param->kernel_accel_min = 1;
+        device_param->kernel_accel_max = 8;
+      }
 
       const u32 kernel_power_max = device_param->hardware_power * device_param->kernel_accel_max;