configs/mx6sx_udoo_neo: bump kernel and U-Boot versions

Bump Linux kernel to 5.8.13 and U-Boot to 2020.10.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

configs/mx6sx_udoo_neo_defconfig

@@ -3,8 +3,8 @@ BR2_cortex_a9=y
 BR2_ARM_ENABLE_NEON=y
 BR2_ARM_ENABLE_VFP=y
 BR2_ARM_FPU_VFPV3=y
-# Linux headers same as kernel, a 4.13 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_13=y
+# Linux headers same as kernel, a 5.8 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_8=y
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/udoo/neo/post-build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/udoo/neo/post-image.sh"
 BR2_TARGET_ROOTFS_EXT2=y
@@ -12,13 +12,13 @@ BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_BOARDNAME="udoo_neo"
 BR2_TARGET_UBOOT_CUSTOM_VERSION=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2017.09"
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2020.10"
 BR2_TARGET_UBOOT_FORMAT_IMG=y
 BR2_TARGET_UBOOT_SPL=y
 BR2_TARGET_UBOOT_SPL_NAME="SPL"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.13.3"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.8.13"
 BR2_LINUX_KERNEL_DEFCONFIG="imx_v6_v7"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx6sx-udoo-neo-basic imx6sx-udoo-neo-full imx6sx-udoo-neo-extended"