SDL: Fix Compilation CI

SDL Commits
1 
From fc78d0ff39d14cbff4cb93d5de7e9c9ecb553e35 Mon Sep 17 00:00:00 2001
From: Francisco Javier Trujillo Mata <[EMAIL REDACTED]>
Date: Thu, 16 Jun 2022 00:36:52 +0200
Subject: [PATCH] Fix Compilation CI

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 62a7c174678..c72ba19e212 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2522,7 +2522,7 @@ elseif(PSP)
     )
 
 elseif(PS2)
-  list(APPEND EXTRA_CFLAGS "-DPS2")
+  list(APPEND EXTRA_CFLAGS "-DPS2" "-D__PS2__")
 
   if(SDL_FILESYSTEM)
     set(SDL_FILESYSTEM_PS2 1)