[build][cmake] prefer USING_VERSION_SDL3 over PLATFORM_DESKTOP_SDL3

Author: brccabral

cmake/LibraryConfigurations.cmake

@@ -104,7 +104,7 @@ elseif ("${PLATFORM}" MATCHES "SDL")
 	# First, check if SDL is included as a subdirectory
 	if(TARGET SDL3::SDL3)
 		message(STATUS "Using SDL3 from subdirectory")
-		set(PLATFORM_CPP "PLATFORM_DESKTOP_SDL3")
+		set(PLATFORM_CPP "PLATFORM_DESKTOP_SDL")
 		set(LIBS_PRIVATE SDL3::SDL3)
 		add_compile_definitions(USING_SDL3_PROJECT)
 	elseif(TARGET SDL2::SDL2)
@@ -120,8 +120,8 @@ elseif ("${PLATFORM}" MATCHES "SDL")
 		find_package(SDL3 QUIET)
 		if(SDL3_FOUND)
 			message(STATUS "Found SDL3 via find_package()")
-			set(PLATFORM_CPP "PLATFORM_DESKTOP_SDL3")
 			set(LIBS_PRIVATE SDL3::SDL3)
+			set(PLATFORM_CPP "PLATFORM_DESKTOP_SDL")
 			add_compile_definitions(USING_SDL3_PACKAGE)
 		else()
 			# Fallback to SDL2

src/rcore.c

@@ -553,8 +553,6 @@ const char *TextFormat(const char *text, ...); // Formatting of text with variab
     #include "platforms/rcore_desktop_glfw.c"
 #elif defined(PLATFORM_DESKTOP_SDL)
     #include "platforms/rcore_desktop_sdl.c"
-#elif defined(PLATFORM_DESKTOP_SDL3)
-    #include "platforms/rcore_desktop_sdl.c"
 #elif (defined(PLATFORM_DESKTOP_RGFW) || defined(PLATFORM_WEB_RGFW))
     #include "platforms/rcore_desktop_rgfw.c"
 #elif defined(PLATFORM_DESKTOP_WIN32)