Change a64_linux source

Since the original mirror was shutdown provide a copy for the
meantime.

Issue #24.

Author: cnuke

ports/a64_linux.hash

@@ -1 +1 @@
-c552684c04213913e5a85fb40ed3b9220eb26d36
+8196780be7831123bf3721fc2c9a503bdf4bd38b

ports/a64_linux.port

@@ -2,9 +2,9 @@ LICENSE   := GPLv2
 VERSION   := git
 DOWNLOADS := a64_linux.archive
 
-REV(a64_linux) := orange-pi-6.1-20230214-2103
-URL(a64_linux) := https://github.com/megous/linux/archive/${REV(a64_linux)}.tar.gz
-SHA(a64_linux) := af0253c5c377b591d0f4576f69c5f3a71fb25cb3abfa068f90216c8478969679
+REV(a64_linux) := 40561fa3c8b8467fc74ead6cbb409c90dbb01fdb
+URL(a64_linux) := https://github.com/cnuke/a64_linux/archive/${REV(a64_linux)}.tar.gz
+SHA(a64_linux) := 6b2d09492df402fb96fd9d0e504f942f1cd3e9e84fe3a853ead791b3d5cfd394
 DIR(a64_linux) := src/linux
 
 PATCHES := \