separate Arkanoid from Zapper code; add mouse sensitivity

src/drivers/libretro/libretro_core_options.h

@@ -55,7 +55,7 @@ struct retro_core_option_v2_category option_cats_us[] = {
    {
       "input",
       "Input",
-      "Change turbo and light gun settings."
+      "Change turbo, Arkanoid and light gun settings."
    },
    {
       "hacks",
@@ -591,6 +591,53 @@ struct retro_core_option_v2_definition option_defs[] = {
       },
       "enabled",
    },
+   {
+      "fceumm_arkanoid_mode",
+      "Arkanoid Mode",
+      NULL,
+      "Selects device to use for Arkanoid games.",
+      NULL,
+      "input",
+      {
+         { "abs_mouse",      "Absolute mouse" },
+         { "mouse",          "Mouse" },
+         { "stelladaptor",   "Stelladaptor" },
+         { "touchscreen",    "Touchscreen" },
+         { NULL, NULL },
+      },
+      "mouse",
+   },
+   {
+      "fceumm_mouse_sensitivity",
+      "Mouse Sensitivity",
+      NULL,
+      "Mouse sensitivity in percent.",
+      NULL,
+      "input",
+      {
+         { "20", NULL },
+         { "30", NULL },
+         { "40", NULL },
+         { "50", NULL },
+         { "60", NULL },
+         { "70", NULL },
+         { "80", NULL },
+         { "90", NULL },
+         { "100", NULL },
+         { "110", NULL },
+         { "120", NULL },
+         { "130", NULL },
+         { "140", NULL },
+         { "150", NULL },
+         { "160", NULL },
+         { "170", NULL },
+         { "180", NULL },
+         { "190", NULL },
+         { "200", NULL },
+         { NULL, NULL },
+      },
+      "100",
+   },
    {
       "fceumm_up_down_allowed",
       "Allow Opposing Directions",