SDL: N3DS: Update README.

From c7c0e81c1ccfd63d3d3bbc59c95f8c489b4e6f2a Mon Sep 17 00:00:00 2001
From: Pierre Wendling <[EMAIL REDACTED]>
Date: Sun, 18 Sep 2022 14:01:36 -0400
Subject: [PATCH] N3DS: Update README.

---
 docs/README-n3ds.md | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/docs/README-n3ds.md b/docs/README-n3ds.md
index 761c76dd6944..991eaa07fa55 100644
--- a/docs/README-n3ds.md
+++ b/docs/README-n3ds.md
@@ -22,6 +22,5 @@ cmake --install build
 ## Notes
 
 -   Currently only software rendering is supported.
--   Window are created on the top screen by default, use the `SDL_WINDOW_N3DS_BOTTOM` flag to put them on the bottom screen.
--   SDL2main should be used to ensure all the necessary services are initialised.
--   By default, the extra L2 cache and higher clock speeds of the New 2/3DS lineup are enabled. If you wish to turn it off, [use the PTMSYSM service](https://libctru.devkitpro.org/ptmsysm_8h.html#ae3a437bfd0de05fbc5ba9a460d148430) to turn it off in your program.
+-   SDL2main should be used to ensure ROMFS is enabled.
+-   By default, the extra L2 cache and higher clock speeds of the New 2/3DS lineup are enabled. If you wish to turn it off, use `osSetSpeedupEnable(false)` in your main function.