configs/stm32mp157*: bump kernel version

Since kernel 5.7 is EOL now, this upgrades it to version 5.8.13.

Signed-off-by: Shlomi Vaknin <shlomi.39sd@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
diff --git a/configs/stm32mp157a_dk1_defconfig b/configs/stm32mp157a_dk1_defconfig
index b00c068..6883aab 100644
--- a/configs/stm32mp157a_dk1_defconfig
+++ b/configs/stm32mp157a_dk1_defconfig
@@ -1,11 +1,11 @@
 BR2_arm=y
 BR2_cortex_a7=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_7=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_8=y
 BR2_ROOTFS_OVERLAY="board/stmicroelectronics/stm32mp157a-dk1/overlay/"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/stmicroelectronics/common/stm32mp157/post-image.sh"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.7.10"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.8.13"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/stmicroelectronics/stm32mp157a-dk1/linux.config"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
diff --git a/configs/stm32mp157c_dk2_defconfig b/configs/stm32mp157c_dk2_defconfig
index d89dd18..50d8757 100644
--- a/configs/stm32mp157c_dk2_defconfig
+++ b/configs/stm32mp157c_dk2_defconfig
@@ -1,11 +1,11 @@
 BR2_arm=y
 BR2_cortex_a7=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_7=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_8=y
 BR2_ROOTFS_OVERLAY="board/stmicroelectronics/stm32mp157c-dk2/overlay/"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/stmicroelectronics/common/stm32mp157/post-image.sh"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.7.10"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.8.13"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/stmicroelectronics/stm32mp157c-dk2/linux.config"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y