tools: Do not generate logo when cross-building
This cannot work (unless qemu-user is registered in binfmt_misc) as the
tools will be for a different architecture.
Fixes "make cross_tools" in case CONFIG_VIDEO_LOGO is enabled.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
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