arm-bsp/u-boot:cs1k: Upgrade to v2025.10

All patches have been rebased onto the v2025.10 release branch, with the
changes primarily being updating of offsets and surrounding code in each
hunk.

One minor change between v2024.04 and v2025.10 is that a
CONFIG_BOARD_INIT option was added and must be enabled in order to link
in the `board_init()` symbol. As such, the firmware update patch adding
`board_init()` has been modified to enable this option as well.

The patch that enabled OF_UPSTREAM has been modified slightly in order
to incorporate upstream changes between versions: the SMP changes to the
Corstone1000 FVP device tree were incorporated into the Linux kernel so
are no longer needed in the U-Boot specific device tree. As such, the
patch adding A320 support adds these CPU nodes in order to override them
where appropriate.

In the process, signatures are removed from each patch.

Beyond this, the directory in which U-Boot searches for the EFI capsule
CRT file changed from object tree to source tree, so the recipe is
updated to reflect that.

Signed-off-by: Frazer Carsley <frazer.carsley@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-bsp/conf/machine/include/corstone1000.inc

@@ -26,7 +26,7 @@ TS_SP_SE_PROXY_CONFIG = "corstone1000"
 MACHINE_FEATURES += "ts-smm-gateway ts-se-proxy"
 
 # U-Boot
-PREFERRED_VERSION_u-boot ?= "2025.04"
+PREFERRED_VERSION_u-boot ?= "2025.10"
 MACHINE_FEATURES += "efi"
 EFI_PROVIDER ?= "grub-efi"