Rock-5T: Use previously defined mainline ATF

Author: HeyMeco

config/boards/rock-5t.conf

@@ -42,7 +42,7 @@ function post_family_config__rock5t_use_mainline_uboot() {
 	declare -g BOOTBRANCH="tag:v2026.04"
 	declare -g BOOTPATCHDIR="v2026.04"
 	declare -g BOOTDIR="u-boot-${BOARD}"
-	declare -g UBOOT_TARGET_MAP="BL31=${RKBIN_DIR}/${BL31_BLOB} ROCKCHIP_TPL=${RKBIN_DIR}/${DDR_BLOB};;u-boot-rockchip.bin u-boot-rockchip-spi.bin"
+	declare -g UBOOT_TARGET_MAP="BL31=bl31.elf ROCKCHIP_TPL=${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
 
 	# Just use the binman-provided u-boot-rockchip.bin, which is ready-to-go