Disable mFI secondary_joypad behavior

Some controllers show up as both HID and mFI. In that case we probably
want to let the user pick which driver to use, rather than balance
across them.

This fixes issues with the analog stick moving in the wrong direction
on the y axis.

input/input_driver.c

@@ -3717,7 +3717,7 @@ void joypad_driver_reinit(void *data, const char *joypad_driver_name)
 #endif
    if (!input_driver_st.primary_joypad)
       input_driver_st.primary_joypad    = input_joypad_init_driver(joypad_driver_name, data);
-#ifdef HAVE_MFI
+#if 0
    if (!input_driver_st.secondary_joypad)
       input_driver_st.secondary_joypad  = input_joypad_init_driver("mfi", data);
 #endif
@@ -3800,7 +3800,7 @@ void input_driver_init_joypads(void)
       input_driver_st.primary_joypad        = input_joypad_init_driver(
          settings->arrays.input_joypad_driver,
          input_driver_st.current_data);
-#ifdef HAVE_MFI
+#if 0
    if (!input_driver_st.secondary_joypad)
       input_driver_st.secondary_joypad      = input_joypad_init_driver(
             "mfi",