configs/solidrun_clearfog: bump kernel to 6.6.28

Adjust DTS_NAME to current kernel source tree location of DTs in
per-vendor directories.

Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/6665749909

Cc: Jan Kundrát <jan.kundrat@cesnet.cz>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/solidrun_clearfog_defconfig

@@ -5,8 +5,8 @@ BR2_ARM_ENABLE_NEON=y
 BR2_ARM_ENABLE_VFP=y
 BR2_ARM_FPU_NEON=y
 
-# Linux headers same as kernel, a 4.20 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_20=y
+# Linux headers same as kernel, a 6.6 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_6=y
 
 # System configuration
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/solidrun/clearfog/post-build.sh"
@@ -16,11 +16,11 @@ BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/solidrun/clearfog/genimage.cfg"
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.20"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.6.28"
 BR2_LINUX_KERNEL_DEFCONFIG="mvebu_v7"
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/solidrun/clearfog/linux.fragment"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="armada-388-clearfog-base"
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="marvell/armada-388-clearfog-base"
 BR2_LINUX_KERNEL_INSTALL_TARGET=y
 
 # Filesystem