decklink: fix build for kernel 6.15

diff --git a/blackmagic-io-14.4.1a4/bm_util.c b/blackmagic-io-14.4.1a4/bm_util.c

index 66751cb..bf9723c 100644

--- a/blackmagic-io-14.4.1a4/bm_util.c

+++ b/blackmagic-io-14.4.1a4/bm_util.c

@@ -471,10 +471,10 @@ void bm_timer_free(bm_timer_t* timer)

 {

 #if KERNEL_VERSION_OR_LATER(4, 15, 0)

 	struct bm_timer_wrapper* timer_wrapper = container_of(timer, struct bm_timer_wrapper, timer);

-	del_timer(timer);

+	timer_delete(timer);

 	bm_kfree(timer_wrapper);

 #else

-	del_timer(timer);

+	timer_delete(timer);

 	bm_kfree(timer);

 #endif

 }

@@ -491,7 +491,7 @@ void bm_timer_expire_at(bm_timer_t* timer, uint64_t ns)

 void bm_timer_cancel(bm_timer_t* timer)

 {

-	del_timer_sync(timer);

+	timer_delete_sync(timer);

 }

 // Event waiting

  # See pkgs/by-name/bl/blackmagic-desktop-video/package.nix for more.

  inherit (blackmagic-desktop-video) src version;

  patches = lib.optionals (lib.versionAtLeast kernel.modDirVersion "6.13") [

  patches =

    (lib.optionals (lib.versionAtLeast kernel.modDirVersion "6.13") [

      # needed for version 14.4.x to build for kernel 6.13

      (fetchpatch {

        name = "01-update-makefiles";

        url = "https://aur.archlinux.org/cgit/aur.git/plain/01-update-makefiles.patch?h=decklink";

        hash = "sha256-l3iu0fG/QJMdGI/WSlNn+qjF4nK25JxoiwhPrMGTqE4=";

      })

  ];

    ])

    ++ (lib.optionals (lib.versionAtLeast kernel.modDirVersion "6.15") [

      # needed for version 14.4.x to build for kernel 6.15

      ./02-rename-timer-delete.patch

    ]);

  KERNELDIR = "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build";

  INSTALL_MOD_PATH = placeholder "out";