configs/stm32f429: force usage of binutils 2.28.x

Fixes #11051

Due to runtime issue with the usage of binutils 2.29.x, we need to use the
version 2.28.x

Signed-off-by: Christophe Priouzeau <christophe.priouzeau@st.com>
Acked-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/stm32f429_disco_defconfig

@@ -2,6 +2,7 @@ BR2_arm=y
 BR2_cortex_m4=y
 BR2_GLOBAL_PATCH_DIR="board/stmicroelectronics/stm32f429-disco/patches"
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_11=y
+BR2_BINUTILS_VERSION_2_28_X=y
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/stmicroelectronics/stm32-post-build.sh"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y