configs/arm_foundationv8: bump to Linux 6.1.13

- Bump Linux kernel to v6.1.13 and increase the rootfs size accordingly.
- Bump the FVP in the readme to version 11.20 build 15 and update the
  command line.

Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/arm/foundation-v8/readme.txt

@@ -3,14 +3,14 @@ ARM software simulator of the AArch64 architecture.
 
 First, one has to download the AArch64 software simulator from:
 
-  https://silver.arm.com/download/download.tm?pv=4807186
+  https://armkeil.blob.core.windows.net/developer/Files/downloads/ecosystem-models/Foundation_Platform_11.20_15_Linux64.tgz
 
 Then, use the arm_foundationv8_defconfig configuration to build your
 Buildroot system.
 
 Finally, boot your system with:
 
- ${LOCATION_OF_FOUNDATIONV8_SIMULATOR}/models/Linux64_GCC-6.4/Foundation_Platform \
+ ${LOCATION_OF_FOUNDATIONV8_SIMULATOR}/models/Linux64_GCC-9.3/Foundation_Platform \
     --image output/images/linux-system.axf \
     --block-device output/images/rootfs.ext2 \
     --network=nat \

configs/arm_foundationv8_defconfig

@@ -1,15 +1,16 @@
 BR2_aarch64=y
-# Linux headers same as kernel, a 5.16 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_16=y
+# Linux headers same as kernel, a 6.1 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_1=y
 BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.16.20"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.1.13"
 BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="arm/foundation-v8-gicv3-psci"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="128M"
 # BR2_TARGET_ROOTFS_TAR is not set
 BR2_TARGET_BOOT_WRAPPER_AARCH64=y
 BR2_TARGET_BOOT_WRAPPER_AARCH64_DTS="arm/foundation-v8-gicv3-psci"