Makefile: Use correct objcopy binary when cross-compiling for x86_64

Use the compiler toolchain version of objcopy instead of the native one
when cross-compiling for the x86_64 architecture.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
1 file changed