SDL_mixer: upgrade vendored libxmp to latest 4.7.0 release

From e83d3c160ea1da9eff4c65f1c49611a6eb909902 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Wed, 25 Feb 2026 05:11:50 +0300
Subject: [PATCH] upgrade vendored libxmp to latest 4.7.0 release

---
 .gitmodules     | 2 +-
 external/libxmp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.gitmodules b/.gitmodules
index 2f2fd2ad..5e8aebf4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -29,7 +29,7 @@
 [submodule "external/libxmp"]
 	path = external/libxmp
 	url = https://github.com/libsdl-org/libxmp.git
-	branch = 4.6.3-SDL
+	branch = 4.7.0-SDL
 [submodule "external/wavpack"]
 	path = external/wavpack
 	url = https://github.com/libsdl-org/wavpack.git
diff --git a/external/libxmp b/external/libxmp
index 1e4b00d6..75e85f8a 160000
--- a/external/libxmp
+++ b/external/libxmp
@@ -1 +1 @@
-Subproject commit 1e4b00d677c217ba303ffaa4f5d4a0e6a0cbf22c
+Subproject commit 75e85f8a5be65f9f95fb946086bee17da158166f