Revert "configs/stm32f429: force usage of binutils 2.28.x"

This reverts commit cbe43fd417d77f846f1ca47cdacd51a73be1aaec.

Now that the binutils default has been changed for ARMv7M, this is no longer
needed.

Signed-off-by: Christophe Priouzeau <christophe.priouzeau@st.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/stm32f429_disco_defconfig

@@ -2,7 +2,6 @@ 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

linux/Config.in

@@ -8,7 +8,7 @@ config BR2_LINUX_KERNEL
 
 if BR2_LINUX_KERNEL
 
-comment "Linux kernel will not boot with binutils >= 2.29"
+comment "Linux kernel may fail to boot with binutils >= 2.29"
 	depends on BR2_ARM_CPU_ARMV7M
 	depends on !BR2_BINUTILS_VERSION_2_28_X