kexec: arm64: disabled check if kaslr-seed dtb property was wiped

kexec: arm64: disabled check if kaslr-seed dtb property was wiped

qemuarm64 fails to kexec secondary kernel with following message:

setup_2nd_dtb: kaslr-seed is not wiped to 0.
kexec: setup_2nd_dtb failed.
kexec: load failed.

It happens because kaslr-seed is not wiped in case when CONFIG_RANDOMIZE_BASE
is not set and qemu generates chosen/kaslr-seed property.

Solution is to remove check in kexec-tools that kaslr-seed is 0.

Signed-off-by: Alexander Kamensky <alexander.kamensky42@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>