configs/spike_riscv64: bump opensbi and kernel versions

Bump OpenSBI to v1.4 and Kernel to v6.6.26.

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

configs/spike_riscv64_defconfig

@@ -2,15 +2,15 @@ BR2_riscv=y
 BR2_RISCV_64=y
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.1.14"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.6.26"
 BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/spike/riscv64/linux.fragment"
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_1=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_6=y
 BR2_TARGET_ROOTFS_CPIO=y
 # BR2_TARGET_ROOTFS_TAR is not set
 BR2_TARGET_OPENSBI=y
 BR2_TARGET_OPENSBI_CUSTOM_VERSION=y
-BR2_TARGET_OPENSBI_CUSTOM_VERSION_VALUE="1.2"
+BR2_TARGET_OPENSBI_CUSTOM_VERSION_VALUE="1.4"
 BR2_TARGET_OPENSBI_PLAT="generic"
 BR2_TARGET_OPENSBI_LINUX_PAYLOAD=y
 BR2_PACKAGE_HOST_RISCV_ISA_SIM=y