nanopct6(-lts): u-boot: bump to v2026.01-rc2

Author: rpardini

config/boards/nanopct6.conf

@@ -42,8 +42,8 @@ function post_family_config__nanopct6_use_mainline_uboot() {
 	declare -g BOOTCONFIG="nanopc-t6-rk3588_defconfig"
 	declare -g BOOTDELAY=1
 	declare -g BOOTSOURCE="https://github.com/u-boot/u-boot.git"
-	declare -g BOOTBRANCH="tag:v2025.10"
-	declare -g BOOTPATCHDIR="v2025.10"
+	declare -g BOOTBRANCH="tag:v2026.01-rc2"
+	declare -g BOOTPATCHDIR="v2026.01"
 	declare -g BOOTDIR="u-boot-${BOARD}"
 	declare -g UBOOT_TARGET_MAP="BL31=bl31.elf ROCKCHIP_TPL=${RKBIN_DIR}/${DDR_BLOB};;u-boot-rockchip.bin u-boot-rockchip-spi.bin"
 	unset uboot_custom_postprocess write_uboot_platform write_uboot_platform_mtd # disable stuff from rockchip64_common; we're using binman here which does all the work already