configs/cubieboard2: bump Linux to 6.12.24 and U-Boot to 2025.04

Signed-off-by: Scott Fan <fancp2007@gmail.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 1223b4b702cc92602f1abdf3d1210bb05a02d4d1)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>

board/cubietech/cubieboard2/patches/linux/linux.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256  9423f4bfb4d875417e39cb0b017b5499fea47da56119f0cd28a201735d898f14  linux-6.12.14.tar.xz
+sha256  643142c1b5991560dd12f950825cc19e4497b95b82641918ecff1177f4130c1d  linux-6.12.24.tar.xz

configs/cubieboard2_defconfig

@@ -9,7 +9,7 @@ BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/cubietech/cubieboard2/genimage.cfg"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.12.14"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.12.24"
 BR2_LINUX_KERNEL_DEFCONFIG="multi_v7"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="allwinner/sun7i-a20-cubieboard2"