airoha: update an7581 linux kernel

Changes:
* a484f851 Revert "block: paritions: Align FIT remaining space to 512KB"
* d3acd72f Revert "fitblk: Enable fitblk rootfs data partition"

Issue: #16552

airoha/Config.in

@@ -3,7 +3,7 @@ if TARGET_airoha
 	config KERNEL_GIT_CLONE_URI
 		default "https://dev.iopsys.eu/airoha/linux.git"
 	config KERNEL_GIT_REF
-		default "c12dccbe34dc4af0025a2b28b091913109b8db68" if TARGET_airoha_an7581
+		default "d3acd72fe58e6342886ed95859ba81f7cd1140e7" if TARGET_airoha_an7581
 		default "ec7d684104cb9c3d372c7406a6dccd1a9095550a" if TARGET_airoha_en7523
 	config KERNEL_GIT_MIRROR_HASH
 		default "e76032cce99c247d73bae1b67bc7a1de58a8a3def4c6f2426f322ad062b608de"