gnu: Add kvmfr-linux-module.

* gnu/packages/patches/kvmfr-linux-module-fix-build.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add patch.
* gnu/packages/video.scm (kvmfr-linux-module): New variable.

Change-Id: I113c1c8e1f6c9ebd541083b620ea0e098d56d588

gnu/packages/patches/kvmfr-linux-module-fix-build.patch

@@ -0,0 +1,41 @@
+Copied from
+https://github.com/gnif/LookingGlass/issues/1075#issuecomment-1546422678 and
+https://github.com/gnif/LookingGlass/issues/1134 with adjustments for current
+kvmfr source version.
+
+From c4950a830fbe2ca27337793aa227c86f5c044f46 Mon Sep 17 00:00:00 2001
+From: Oleg Pykhalov <go.wigust@gmail.com>
+Date: Sat, 5 Oct 2024 16:11:45 +0300
+Subject: [PATCH] Fix build
+
+---
+ module/kvmfr.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/module/kvmfr.c b/module/kvmfr.c
+index 121aae5..4c386f9 100644
+--- a/module/kvmfr.c
++++ b/module/kvmfr.c
+@@ -30,6 +30,7 @@
+ #include <linux/highmem.h>
+ #include <linux/memremap.h>
+ #include <linux/version.h>
++#include <linux/vmalloc.h>
+ 
+ #include <asm/io.h>
+ 
+@@ -539,7 +540,11 @@ static int __init kvmfr_module_init(void)
+   if (kvmfr->major < 0)
+     goto out_free;
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0)
+   kvmfr->pClass = class_create(THIS_MODULE, KVMFR_DEV_NAME);
++#else
++  kvmfr->pClass = class_create(KVMFR_DEV_NAME);
++#endif
+   if (IS_ERR(kvmfr->pClass))
+     goto out_unreg;
+ 
+-- 
+2.41.0
+