Revert upstream commit 347519a4d8f3befb719f11eeb0121c736ce64dee,
which breaks keyboard input.

Index: input/drivers/x11_input.c
--- input/drivers/x11_input.c.orig
+++ input/drivers/x11_input.c
@@ -71,7 +71,7 @@ static void *x_input_init(const char *joypad_driver)
 
 static bool x_keyboard_pressed(x11_input_t *x11, unsigned key)
 {
-   int keycode = rarch_keysym_lut[(enum retro_key)key];
+   int keycode = XKeysymToKeycode(x11->display, rarch_keysym_lut[(enum retro_key)key]);
    return x11->state[keycode >> 3] & (1 << (keycode & 7));
 }
 
