arm64: versal: Support operations around multiboot register

Read multiboot register and show it's value by default.
Also extend logic in dfu_alt_info string generation to support capsule
update for different offsets.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/72ba2efd0fb7b66a86b409a1521fe288a4dd3453.1733395093.git.michal.simek@amd.com
1 file changed