image: android: use ulong for kernel address

image: android: use ulong for kernel address

When booting with platforms having > 4GiB of memory,
the kernel physical address can be more than 32bits.

Use ulong like all the other addresses, and fix the
print to show the > 32bits address numbers.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Tested-by: Guillaume La Roque <glaroque@baylibre.com>
Link: https://lore.kernel.org/r/20241017-topic-fastboot-fixes-mkbootimg-v2-1-c3927102d931@linaro.org
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>